Blacklight is commonly used to authenticate oil paintings, antiques and banknotes. It can also differentiate real currency from counterfeit notes because, in many countries, legal banknotes have fluorescent symbols on them that only show under a blacklight. In addition, the paper used for printing money does not contain any of the brightening agents which cause commercially available papers to fluoresce under blacklight. Both of these features make illegal notes easier to detect and more difficult to successfully counterfeit. The same security features can be applied to identification cards such as passports or driver's licenses.

Blacklights are a common tool for rock-hunting and identification of minerals by their fluorescence. The most common minerals and rocks that glow under UV light are fluorite, calcite, aragonite, opal, apatite, chalcedony, corundum (ruby and sapphire), scheelite, selenite, smithsonite, sphalerite, sodalite. The first person to observe fluorescence in minerals was George Stokes in 1852. He noted the ability of fluorite to produce a blue glow when illuminated with ultraviolet light and called this phenomenon “fluorescence” after the mineral fluorite. Lamps used to visualise seams of fluorite and other fluorescent minerals are commonly used in mines but they tend to be on an industrial scale. The lamps need to be short wavelength to be useful for this purpose and of scientific grade. UVP range of hand held UV lamps are ideal for this purpose and are used by Geologists to identify the best sources of fluorite in mines or potential new mines. Some transparent selenite crystals exhibit an “hourglass” pattern under UV light that is not visible in natural light. These crystals are also phosphorescent. Limestone, marble, and travertine can glow because of calcite presence. Granite, syenite, and granitic pegmatite rocks can also glow.

Green laser pointer is now the world's most popular laser pointer, because the green light than red light 6 times more than red light beam significantly, while the price is much cheaper than the blue and yellow. Green pen is the wavelength of light emitted 500-550nm, the wavelength sensitivity of the coefficient table, as is the closest one wavelength. Green is undoubtedly efficient light source, the eye more easily identified. The green light sensitivity of the human eye is higher than a lot of red; the other is green light scattering in the atmosphere more than red light. The uses of green high power laser pointer have become quite acceptable in astronomy not just in pointing objects but also in the processes necessary to adjust telescopes and for astrophotography. It is no wonder that the reason why 10000mw green lasers are commonly used in astronomy is because of its visibility. The powerful of the 10000mw lasers that application will have outstanding effects in some fields.

High power laser pointer have been favored in laser pointers market and are increasingly popular among enthusiasts. Most of powerful laser pointers have the function of burning, so it is necessary to pay attention to safety during use. It is necessary to wear protective glasses, which can prevent the eyes from being affected by strong high powered lasers, causing discomfort and injury. We develop more and more high power lasers for you.

by A Langenbucher · 2017 · Cited by 12 — Die IOL ohne Aberration im kollimierten Strahlengang liefert eine optische Weglängendifferenz von −1,8 μm und LSA von 0,15 m−1 im konvergenten Strahlengang.

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Although blacklights produce light in the UV range, their spectrum is mostly confined to the longwave UVA region, that is, UV radiation nearest in wavelength to visible light, with low frequency and therefore relatively low energy. While low, there is still some power of a conventional blacklight in the UVB range.[14] UVA is the safest of the three spectra of UV light, although high exposure to UVA has been linked to the development of skin cancer in humans. The relatively low energy of UVA light does not cause sunburn. It can damage collagen fibers, so may accelerate skin aging and cause wrinkles. It can also degrade vitamin A in the skin.

Flat-top Gaussian

Don't look directly with your eyes or using binoculars and other equipment to observe the laser beam on the remote control. Never let the laser point to a mirror or other highly reflective surfaces

Don't allow the laser beam to enter the eye. The laser beam is harmful to eyes, any contact will cause permanent damage. Not the laser point to the crowd, especially in the face

SquareLaser beam

Fluorescent blacklight tubes are typically made in the same fashion as normal fluorescent tubes except that a phosphor that emits UVA light instead of visible white light is used on the inside of the tube. The type most commonly used for blacklights, designated blacklight blue or "BLB" by the industry, has a dark blue filter coating on the tube, which filters out most visible light, so that fluorescence effects can be observed.[9] These tubes have a dim violet glow when operating. They should not be confused with "blacklight" or "BL" tubes, which have no filter coating, and have a brighter blue color.[10][9] These are made for use in "bug zapper" insect traps where the emission of visible light does not interfere with the performance of the product. The phosphor typically used for a near 368 to 371 nanometer emission peak is either europium-doped strontium fluoroborate (SrB2F8:Eu2+) or europium-doped strontium borate (Sr3B2O6:Eu2+) while the phosphor used to produce a peak around 350 to 353 nanometres is lead-doped barium silicate (BaSi2O5:Pb+). "Blacklight blue" lamps peak at 365 nm.[11]

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UV-A presents a potential hazard when eyes and skin are exposed, especially to high power sources. According to the World Health Organization, UV-A is responsible for the initial tanning of skin and it contributes to skin ageing and wrinkling. UV-A may also contribute to the progression of skin cancers.[7] Additionally, UV-A can have negative effects on eyes in both the short-term and long-term.[8]

Now, more and more laser pointer and flashlights sold in the market are class IIIB with a power over 5mW. But when the light directly penetrates into the eyes, there may be some damage. Especially to some high power, diffuse light probably damage the eyes, the focus are more likely to ignite flammable materials. The eye is of prime interest for two reasons: Firstly, the eye is the only organ of the body that allows optical radiations, from 400 to 1400 nm, to penetrate deep within it. Secondly, the refractive properties of the cornea and lens result in an increase in irradiance (W/cm2). If sufficient energy falls upon the retina to produce irreversible damage then such damage may occur as a result of one of three primary damage mechanisms. Therefore laser pointers are not a toy, not suitable for kids. When operating powerful light pointer, wear special secure glasses would be safe, especially for the invisible lights.

Anti-reflection. Anti-reflective coating eliminates ghost images as well as reduces eye-fatigue from fluorescent lighting and driving at night.

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flat-topbeamshaper thorlabs

Fluorescent materials are also very widely used in numerous applications in molecular biology, often as "tags" which bind themselves to a substance of interest (for example, DNA), so allowing their visualization.

Flat laser

If a leak is suspected in a refrigerator or an air conditioning system, a UV tracer dye can be injected into the system along with the compressor lubricant oil and refrigerant mixture. The system is then run in order to circulate the dye across the piping and components and then the system is examined with a blacklight lamp. Any evidence of fluorescent dye then pinpoints the leaking part which needs replacement.

One of the innovations for night and all-weather flying used by the US, UK, Japan and Germany during World War II was the use of UV interior lighting to illuminate the instrument panel, giving a safer alternative to the radium-painted instrument faces and pointers, and an intensity that could be varied easily and without visible illumination that would give away an aircraft's position. This went so far as to include the printing of charts that were marked in UV-fluorescent inks, and the provision of UV-visible pencils and slide rules such as the E6B.

Ultraviolet light can be generated by some light-emitting diodes, but wavelengths shorter than 380 nm are uncommon, and the emission peaks are broad, so only the very lowest energy UV photons are emitted, within predominant not visible light.

UVA light has been shown to cause DNA damage, but not directly, like UVB and UVC. Due to its longer wavelength, it is absorbed less and reaches deeper into skin layers, where it produces reactive chemical intermediates such as hydroxyl and oxygen radicals, which in turn can damage DNA and result in a risk of melanoma. The weak output of blacklights is not sufficient to cause DNA damage or cellular mutations in the way that direct summer sunlight can, although there are reports that overexposure to the type of UV radiation used for creating artificial suntans on sunbeds can cause DNA damage, photo-aging (damage to the skin from prolonged exposure to sunlight), toughening of the skin, suppression of the immune system, cataract formation and skin cancer.[15][16]

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A Wood's lamp is a diagnostic tool used in dermatology by which ultraviolet light is shone (at a wavelength of approximately 365 nanometers) onto the skin of the patient; a technician then observes any subsequent fluorescence. For example, porphyrins—associated with some skin diseases—will fluoresce pink. Though the technique for producing a source of ultraviolet light was devised by Robert Williams Wood in 1903 using "Wood's glass", it was in 1925 that the technique was used in dermatology by Margarot and Deveze for the detection of fungal infection of hair. It has many uses, both in distinguishing fluorescent conditions from other conditions and in locating the precise boundaries of the condition.

by M Moshirfar · 2010 · Cited by 9 — Conventional spherical IOLs increase the positive spherical aberration in the eye following cataract extraction.13,14 In 2002, an aspheric IOL design was ...

Diodelaser beamshape

A blacklight, also called a UV-A light, Wood's lamp, or ultraviolet light, is a lamp that emits long-wave (UV-A) ultraviolet light and very little visible light.[1][2][3] One type of lamp has a violet filter material, either on the bulb or in a separate glass filter in the lamp housing, which blocks most visible light and allows through UV,[2] so the lamp has a dim violet glow when operating.[4][5] Blacklight lamps which have this filter have a lighting industry designation that includes the letters "BLB".[2][4] This stands for "blacklight blue". A second type of lamp produces ultraviolet but does not have the filter material, so it produces more visible light and has a blue color when operating.[2][3][4] These tubes are made for use in "bug zapper" insect traps, and are identified by the industry designation "BL".[4][5] This stands for "blacklight".

A Fresnel (pronounced fray-NEL) lens replaces the curved surface of a conventional optical lens with a series of concentric grooves. These contours act as ...

Blacklight is used to illuminate pictures painted with fluorescent colors, particularly on black velvet, which intensifies the illusion of self-illumination. The use of such materials, often in the form of tiles viewed in a sensory room under UV light, is common in the United Kingdom for the education of students with profound and multiple learning difficulties.[25] Such fluorescence from certain textile fibers, especially those bearing optical brightener residues, can also be used for recreational effect, as seen, for example, in the opening credits of the James Bond film A View to a Kill. Blacklight puppetry is performed in a blacklight theater.

Burning laser pointer are becoming more and more popular, from the original blue, to the green and red. There are 146 more on our website at present. With lasers now able to reach speeds of up to 5,000mW or 5 watts that can be used for a variety of tasks. It can be used for cutting, welding, and drilling. It can also be used for engraving and marking. This beam of light can be used to burn through many materials, including tires. it is critical to understand where the burning limit is and to keep it at a minimum of 100mW as a general rule. The shape has expanded from one to a variety of shapes, and the flashlight shape is the most. Recently, we have developed a number of Gatlin shapes, which feature good feels and textures.

Optics is the way in which the refraction of light is managed to maximize vision for the contact lens wearer3. Contact lenses with aspheric optics may provide ...

UV light can be used to harden particular glues, resins and inks by causing a photochemical reaction inside those substances. This process of hardening is called ‘curing’. UV curing is adaptable to printing, coating, decorating, stereolithography, and in the assembly of a variety of products and materials. In comparison to other technologies, curing with UV energy may be considered a low-temperature process, a high-speed process, and is a solventless process, as cure occurs via direct polymerization rather than by evaporation. Originally introduced in the 1960s, this technology has streamlined and increased automation in many industries in the manufacturing sector. A primary advantage of curing with ultraviolet light is the speed at which a material can be processed. Speeding up the curing or drying step in a process can reduce flaws and errors by decreasing time that an ink or coating spends wet. This can increase the quality of a finished item, and potentially allow for greater consistency. Another benefit to decreasing manufacturing time is that less space needs to be devoted to storing items which can not be used until the drying step is finished. Because UV energy has unique interactions with many different materials, UV curing allows for the creation of products with characteristics not achievable via other means. This has led to UV curing becoming fundamental in many fields of manufacturing and technology, where changes in strength, hardness, durability, chemical resistance, and many other properties are required.

Therefore, customers can buy and use it by following the local laws and regulations. In the event of resale, you also need to incorporate this notation in the product description, so that any potential buyer can be well informed before making purchasing decision

They may also be used to test for LSD, which fluoresces under blacklight while common substitutes such as 25I-NBOMe do not.[26]

Flat beam laserpointer

Blue Laser pointer with 405 nanometers wavelength of light. Although it is rarely prefered to the green and red ones, it could be used for what others do, which also reflects the individual unique aesthetic taste. It is probably not as much preferred lasers as an astronomy laser pointer, because brighter colors would make an object more visible in the sky. However it comes down to all other uses such as pinpointing something on the large screen or on the blackboard. Although high powered lasers are becoming more popular, very few people are aware of their applications. Blue lasers are best tool in astronomy as they can be used to better focus miles into the night sky. It is now easier to point stars and other celestial bodies in space with the help of this technology. It should be high power, high quality components and have out standing beam specifications. The blue lasers that you browse meet all of your expectations as well as those of the law and safety concerns.

Although many other types of lamp emit ultraviolet light with visible light, blacklights are essential when UV-A light without visible light is needed, particularly in observing fluorescence,[3][4] the colored glow that many substances emit when exposed to UV. They are employed for decorative and artistic lighting effects, diagnostic and therapeutic uses in medicine,[2] the detection of substances tagged with fluorescent dyes, rock-hunting, scorpion-hunting,[6] the detection of counterfeit money, the curing of plastic resins, attracting insects[3] and the detection of refrigerant leaks affecting refrigerators and air conditioning systems. Strong sources of long-wave ultraviolet light are used in tanning beds.[3]

A blacklight may also be formed by simply using a UV filter coating such as Wood's glass on the envelope of a common incandescent bulb. This was the method that was used to create the very first blacklight sources. Although incandescent bulbs are a cheaper alternative to fluorescent tubes, they are exceptionally inefficient at producing UV light since most of the light emitted by the filament is visible light which must be blocked. Due to its black body spectrum, an incandescent light radiates less than 0.1% of its energy as UV light. Incandescent UV bulbs, due to the necessary absorption of the visible light, become very hot during use. This heat is, in fact, encouraged in such bulbs, since a hotter filament increases the proportion of UVA in the black-body radiation emitted. This high running-temperature reduces the life of the lamp from a typical 1,000 hours to around 100 hours.

Manufacturers use different numbering systems for blacklight tubes. Philips' is becoming outdated (as of 2010), while the (German) Osram system is becoming dominant outside North America. The following table lists the tubes generating blue, UVA and UVB, in order of decreasing wavelength of the most intense peak.[a] Approximate phosphor compositions, major manufacturer's type numbers and some uses are given as an overview of the types available. "Peak" position is approximated to the nearest 10 nm. "Width" is the measure between points on the shoulders of the peak that represent 50% intensity.

Top-Hatbeamshaper

Other security applications include the use of pens containing a fluorescent ink, generally with a soft tip, that can be used to "invisibly" mark items. If the objects that are so marked are subsequently stolen, a blacklight can be used to search for these security markings. At some amusement parks, nightclubs and at other, day-long (or night-long) events, a fluorescent mark is rubber stamped onto the wrist of a guest who can then exercise the option of leaving and being able to return again without paying another admission fee.

Blacklight sources may be specially designed fluorescent lamps, mercury-vapor lamps, light-emitting diodes (LEDs), lasers, or incandescent lamps. In medicine, forensics, and some other scientific fields, such a light source is referred to as a Wood's lamp, named after Robert Williams Wood, who invented the original Wood's glass UV filters.

Another class of UV fluorescent bulb is designed for use in bug zappers. Insects are attracted to the UV light, which they are able to see, and are then electrocuted by the device. These bulbs use the same UV-A emitting phosphor blend as the filtered blacklight, but since they do not need to suppress visible light output, they do not use a purple filter material in the bulb. Plain glass blocks out less of the visible mercury emission spectrum, making them appear light blue-violet to the naked eye. These lamps are referred to by the designation "blacklight" or "BL" in some North American lighting catalogs. These types are not suitable for applications which require the low visible light output of "BLB" tubes[13] lamps.

Blacklight is used extensively in non-destructive testing. Fluorescing fluids are applied to metal structures and illuminated, allowing easy detection of cracks and other weaknesses.

High-power mercury vapor blacklight lamps are made in power ratings of 100 to 1,000 watts. These do not use phosphors, but rely on the intensified and slightly broadened 350–375 nm spectral line of mercury from high pressure discharge at between 5 and 10 standard atmospheres (500 and 1,000 kPa), depending upon the specific type. These lamps use envelopes of Wood's glass or similar optical filter coatings to block out all the visible light and also the short wavelength (UVC) lines of mercury at 184.4 and 253.7 nm, which are harmful to the eyes and skin. A few other spectral lines, falling within the pass band of the Wood's glass between 300 and 400 nm, contribute to the output. These lamps are used mainly for theatrical purposes and concert displays. They are more efficient UVA producers per unit of power consumption than fluorescent tubes.

by R Seshadri · 2022 · Cited by 10 — We study a two-dimensional topological system driven out of equilibrium by the application of elliptically polarized light. In particular, we ...

The 250mW 532nm Green Beam Light Flat Head Laser Gun Sighter provides the most convenient and accurate method for sighting in guns of all types. It generates a high performance laser beam to deliver an aligned sight. With ultra brightness, the beam is noticeable even from long distance away. Made with aluminum alloy casing, it is ultra solid and durable. Perfect for hunters and competitive shooters, this remarkable sighter is sure to take the frustration out of sighting in almost any gun. Don't hesitate to get one!

Ultraviolet radiation is invisible to the human eye, but illuminating certain materials with UV radiation causes the emission of visible light, causing these substances to glow with various colors. This is called fluorescence, and has many practical uses. Blacklights are required to observe fluorescence, since other types of ultraviolet lamps emit visible light which drowns out the dim fluorescent glow.

Usually it will take 5-7 days to process the order when customer placed an order. Individual orders may be delayed due to temporary shortages.You will receive the tracking number after delivery, but our logistics provider is relatively slow to update the tracking number, so the website status will not be updated in time. It is expected that you will receive the tracking number in 10 days. We offer global free air transport service as well as paid courier service.Express delivery freight depends on the quantity of goods and the country of destination.Orders cannot be cancelled when it has been shipped. But you can return your order as you receive it by contacting our Customer Service and getting a RMA.CUSTOMS & BATTERY ISSUEUsually customers can receive their packages without any customs issue , but sometimes customs will check packages shipped by Express shipping (DHL or FedEx), they will contact buyer to clear the customs if it is needed. Customers need to cooperate with carrriers and local customs and get the package.According to international flight safety guidelines, they have very strict stardard for packages with batteries. The package may be rejected if there are too many batteries in the package, Usually we don’t provide batteries. Sincerely hope you can understand this situationPlease remember, shipment in transit is out of our control and the carrier is responsible for any unforeseen delays. But we will do everything we can to help you get your order to you fast. If the package gets lost in transit, we’ll resend for you.

Red laser pointer was released in the early 1980s. The first red lasers Nowadays, the more durable transmitted red light air, dust, water vapor, so the light path can be seen to need more power. 100mW red light probably only about 20 milliwatts green light. But do remember that red lasers are powerful since the light they emit is powerful when it hits a certain object and converges into a point. High powered red lasers can also be mounted on telescopes to help direct other people with telescopes and binoculars to an object. The lasers revolution is quickly engulfing the globe as more and more of us get our paws on these bright red light pointers. It's in particular have evolved to become the example of this huge success. If you haven't seen or are not a part of this yet, you are being left in the technological stone age. It will easily be visible at night in the worst of conditions with the higher powered models even being visible during the day.

Thousands of moth and insect collectors all over the world use various types of blacklights to attract moth and insect specimens for photography and collecting. It is one of the preferred light sources for attracting insects and moths at night. They can illuminate animal excreta, such as urine and vomit, that is not always visible to the naked eye.

FlattopbeamShaper

Please keep the laser pointer away from children (especially the high powered ones) in order to avoid the damage by the children's contacting

Tips: It is normal if there is slight difference in charge than the one listed at check out. The bank will charge a certain amount of money as international transaction service fee.

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A Wood's lamp may be used to rapidly assess whether an individual is suffering from ethylene glycol poisoning as a consequence of antifreeze ingestion. Manufacturers of ethylene glycol-containing antifreezes commonly add fluorescein, which causes the patient's urine to fluoresce under Wood's lamp.[20]

The packaging arrived without any bubble wrap or protection of the item,which made me disappointed.Luckily,the green laser works well as I expected.

Wood's lamp is useful in diagnosing conditions such as tuberous sclerosis[21] and erythrasma (caused by Corynebacterium minutissimum, see above).[22] Additionally, detection of porphyria cutanea tarda can sometimes be made when urine turns pink upon illumination with Wood's lamp.[23] Wood's lamps have also been used to differentiate hypopigmentation from depigmentation such as with vitiligo. A vitiligo patient's skin will appear yellow-green or blue under the Wood's lamp.[citation needed] Its use in detecting melanoma has been reported.[24]