Alpha Industrial Park, Tu Thon Village, Ly Thuong Kiet Commune, Yen My District, Hung Yen Province Vietnam 17721 +84 221-730-8668 rfqvn@shanghai-optics.com

Lasercleanupfilter

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The wavelength passed in a laser line filter is highly dependent on the angle of incidence of the laser beam, and this can be used to fine tune your filter to the exact wavelength your application requires.  Increasing the angle of incidence will cause the center wavelength to shift to shorter wavelengths, and decreasing the angle of incidence will cause a shift to longer wavelengths.  The shift can be calculated with the formula

In this catalog, you will find over 130 glasses which we have selected as our recommended glass types. Each optical glass has its own properties.

Kase AntiLaser Filter

Here λθ is the new center wavelength, λo is the original center wavelength, and no/ne is the ratio of the index of refraction in the environment and in the filter. Note that in air no can be taken to be 1.  In this formula θ is the angle of incidence.

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Light absorption is the process in which light is absorbed by matter and converted into energy. In an atom, electrons vibrate at a specific frequency – this is called the natural frequency. If a wave of light hits a material in which the electrons are vibrating at the same frequency as the wave of light, the electrons will absorb the energy and convert it into vibrational motion. This is why objects have different colours – different materials’ electrons will vibrate at different rates, and therefore absorb different frequencies of light.

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They are also temperature stable, and you can expect a center wavelength shift of less than 0.02 nm per degree Celsius. This miniscule change will be in the direction of the temperature change. When mounting your laser line filter, ensure that the highly reflective side of the filter faces the laser source. This protects the blocking glass and epoxies from thermal load.

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There are two types of emission spectroscopy: line and continuous. When the spectrum is shown as lots of lines separated by black spaces, it is a line emission spectrum. When the spectrum is shown as lots of colours in one particular wavelength, it is a continuous emission spectrum. Emission spectroscopy is used to identify a substance because the energy released when the electrons fall back to their ground state is different for every substance.

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Bestlaser filter

Our factory standards ensure that the surface quality of each of our laser line filters is 60/40 scratch dig. Beam deviation is certified to be no more than 11 arc seconds. Diameter tolerance is +0/-0.1mm, and thickness tolerance is ±0.1mm. The thickness of our factory standard laser lenses is 3.5 mm, and we offer two sizes, Ф12 .5mm or Ф25.0mm. Light blocking is high, with an optical density (OD) of greater than 5.0 from λc ± 1.0% and an OD of greater than 6.0 from λc ± 1.5%.

Please contact us for manufacturing limits or to discuss custom orders. Our team is experienced in designing a wide variety of custom optical systems, and we welcome the opportunity to apply our expertise to your problem.

A laser line filter is a precision optical filter with an extremely narrow passband centered on a standard laser wavelength. These optical filters are used to prevent the distortion of measurement signals and to increase image contrast.  They are used to screen out undesirable background radiation and ambient light.

Electrons can only exist in discrete energy levels (these can also be called electron shells) – they can’t exist halfway between. The lowest energy level that an electron can be in is called the ground state. For an electron to move from a lower energy level to a higher energy level, it must absorb a set amount of energy because energy levels are quantised.  This means that the energy absorbed by the electron must be exactly the same as the energy difference between the two levels.

Our state of the art metrology equipment allows us to ensure that every filter which leaves our factories fully meets all applicable standards. These laser line filters are manufactured of low fluorescence BK7 or an equivalent. Their peak transmittance is greater than 90%, and a typical FWHM (full width half maximum) is 0.38% of λc.  The maximum FWHM is 0.7% of λc.

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by A Lipson · 2010 · Cited by 1072 — Discover Optical Physics, 4th Edition, Ariel Lipson, HB ISBN: 9780521493451 on Higher Education from Cambridge.

Our filters are dielectric coated with state of the art IBS technology. Since we use no adhesives, these laser optical filters are environmentally stable and have a long life span.

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At Shanghai Optics we manufacture laser bandpass filters with ultrahigh peak transmission, typically greater than 90%. These filters have excellent blocking (an optical density of greater than 5.0) from ±1% of the laser wavelength. The narrow bandwidth typical FWHM is less than 0.38% of laser wavelength.

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Emission spectroscopy is used to measure the photons released when an electron falls to a lower energy level after becoming excited. The emission spectrum of a certain material is shown by a black band with separated coloured lines. These colours lines are the parts of the spectrum where photons have been released from the electrons when they fall to a lower energy level.

There are two types of absorption spectroscopy: atomic and molecular. Atomic absorption spectroscopy is the method of producing a spectrum when free atoms absorb different wavelengths of light – this is usually used for gases. Molecular absorption spectroscopy is the method of producing a spectrum when whole molecules absorb different wavelengths of light (usually ultraviolet or visible).

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2022912 — Figure 2.8.2: The simple magnifier is a convex lens used to produce an enlarged image of an object on the retina.

Laserlinefilter

https://www.s-cool.co.uk/a-level/physics/wave-particle-duality-and-electron-energy-levels/revise-it/electron-energy-levels

Absorption spectroscopy is a technique used to measure the absorption of energy. The absorption spectrum of a certain material is shown by a continuous band of colour with black lines between them. The coloured parts represent the total light that is focused on the material. The black lines show an absence of this light – these are the parts of the spectrum where the electrons have absorbed the light photons.

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LaserAirFilter

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When an electron absorbs energy, is it promoted to a higher energy level further away from the nucleus of the atom and is described as being ‘excited’.

Our laser line filters have applications in laser-based fluorescence instrumentation, as well as in Raman spectroscopy and in analytical and medical laser systems. Although laser light is usually considered in terms of a single, monochromatic beam with a single output wavelength, the real world picture is actually much messier. All laser sources include glows, plasma, or lower levels of transitions, and this scattered light can interfere with a clear reading with light detection instrumentation.  Most laser sources also exhibit wavelength shifts when power or temperature changes. Laser cleanup filters are thus essential in eliminating unwanted light and transmit pure, thin-line energy.

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Electrons don’t like being in an excited state. This means that after becoming excited and moving to a higher energy level, they soon fall back to their original energy level. However, to do this, they have to release a packet of energy – this is called a photon. The size of the photon released is exactly equal to the size of the jump the electron had to make in the first place.

The clear aperture of our filters is greater than 80 percent, and the operating temperature of these filters from -45°C to approximately 85°C.  Temperature dependence, within that interval, is guaranteed to be less than 5 5ppmr/°C.

Environmental durability meets MIL-STD-810F military standard requirements, and physical durability MIL-C-48497A. We offer black-anodized aluminum ring mountings for these filters.