The length of the box is important: the longer the box, the bigger your image of the sun will be. To estimate how big the image will be, multiply the length of the box by 0.01. For example, if your box is six feet (72 inches) long, your solar image will be 72 x 0.01 = 0.72 inches in diameter, or about ¾ inch.

QUAD-4TRACK includes powerful, stand alone, LabView software which is used to control the instrument, process the data, and display X and Y position. It also displays the energy or power of your source and repetition rate. The large graphic in this screen shows the position of the centroid of the beam and tracks its movement in real time. The software includes many handy features like: set boundary, zoom (2X to 128X), set resolution, data logging, and many more. The green line represents the tracking history.

DO NOT put your hand or anything flammable near the eyepiece. The concentrated sunlight exiting there can cause a nasty burn or set something ablaze!

Laser beamAnalysis

Make sure that the supplier of your eclipse filter is reputable and reliable—a few are listed below. “Eclipse glasses” are inexpensive filters in cardboard frames made especially for eclipse viewing. You can purchase them online, and usually at science museum stores in areas where an eclipse is visible. You can also look at the Sun with a number 14 welder’s glass, available at welding supply stores.

*Does not include shipping fees, import fees or local representation. Request quote for full details and local sales contact.

There are safe ways to view the sun. The simplest requires only a long box (at least six feet long), a piece of aluminum foil, a pin, and a sheet of white paper.

Laserpower meter

It is never safe to look at an annular eclipse without eye protection, but during a total solar eclipse, there are a few short moments when it’s safe to look directly at the Sun. This is the ONLY time: when the moon completely blocks the face of the Sun. Called totality, it lasts from a few seconds to a few minutes. The instant the moon begins to move off the Sun’s face, you must go back to using safe viewing techniques.

If you want to use a filter on a telescope, use only the filter supplied by the manufacturer or by a manufacturer who makes the filter specifically for the instrument you are using. However, if the manufacturer’s filter is the type that screws onto the eyepiece, DO NOT USE IT! The manufacturers of some inexpensive telescopes supply a welder's glass filter that screws onto the eyepiece. It may heat up and crack as you are looking through the telescope. A proper solar filter always goes on the front end of the telescope, blocking the sunlight before it enters the optical system.

In the 90's, Red Laser Pointers were the first handheld laser pointer to enter the market. A red laser pointer is perfect for indoor use, presentations, ...

Laser beamcharacterization

Dec 7, 2023 — 3) ON CE | Select a Process (Computer with Magnifying Glass button) > Go to Process Tab > select either bg3.exe or bg3_ dx11.exe 4) ON CE ...

Uber-Big Convex and Concave Mirrors · Take care when using the concave mirror in direct sunlight or other bright light. · Can use the fogger machine (shelf 11 ...

In the measurement screen shown on the left, we are tracking the beam stability of a pulsed Nd:YLF laser at 10 Hz. The resolution was set at 0.001 nm, the boundary is at 20 µm (red circle), and the zoom feature is at 64X. The total energy is 108.5 µJ, the final position of the laser is at -8 µm in X and -8 µm in Y. The green tracking line shows the movement of the laser about the zero position over a few hundred pulses.

The ERM-202 is a rotating-polarizer polarization extinction ratio meter and is available in single or dual channel versions.

Lumedica Inc. Map 404 Hunt St., Ste. 510. Durham, NC 27701. United States. Phone: +1 919-244-2128. Call NowEmail CompanyVisit Website. Develops light-based ...

CO2laser beamprofiler

To use your viewer, point the pinhole end of the box right at the Sun. To aim it, move it around until you see a round spot of light on the paper at the other end—that’s your pinhole image of the Sun! If you have trouble aiming your viewer, look at the shadow of the box on the ground. Move it until the shadow is as small as possible—that is, until it looks like the end of the box and the sides are not casting a shadow. Do not look through the pinhole at the Sun! Look only at the image on the paper.

1. Find or make a long box or tube. If you can’t find a long tube, you can tape together two or more shorter ones. (Two triangular shipping tubes, taped together, make a good solar viewer.) Cut out the cardboard at one end of each tube and tape those ends together with duct tape, so that light can travel the length of the tube.

Use your hands. Hold both hands with your fingers overlapping at right angles. The holes between your fingers make pinholes, forming images of the Sun on the ground.

A simple two-lens Abbe condenser is illustrated in Figure 1. In this figure, light from the microscope illumination source passes through the condenser aperture ...

The analog output of the QUAD-4TRACK provides voltage that is directly proportional to the pulse energy or laser power irradiating each QUAD element. When the four voltage outputs are equal, the beam is centered on the QUAD detector. This provides a very useful tool when setting up our QUAD probes with your source for optical alignment.

This is critical! Why? You may have taken a magnifying glass out into the Sun and burned leaves with it. If so, you’ll remember that when sunlight is focused onto a small spot with a lens, it can start a fire. Your eye also has a lens, and if you look at the Sun without proper protection, your eye’s lens will focus sunlight onto a very small spot on the retina on the back of your eye. This literally burns your eye, causing permanent eye damage or blindness. In addition, since there are no pain sensors in your retina, you won’t even know it’s happening!

3. At the other end of the tube, cut a good-sized viewing hole in the side of the box. Put a piece of white paper at the end of the box, right inside the viewing hole. This is the screen where your projected Sun will appear.

By following the instructions above and using a modicum of good sense, you will be able to enjoy solar eclipse after solar eclipse.

4. It will take a little effort to find the Sun. Once you do, you can focus the binoculars to bring the Sun to a sharp image.

Laser beam positionsensor

Our large area pyroelectric quadrant detectors provide unique advantages over other position sensing detectors like silicon quads or lateral effect photodiodes. They are fast, handle high peak power of pulsed lasers without saturation and respond to lasers across the spectrum, from UV to Far IR and even THz. The QUAD-E is intended for use with pulsed sources at up to 1000 Hz, while the QUAD-P is designed for CW and high repetition rate (quasi CW) sources. Both types of detectors can also be used as standalone units, in an analog mode, for incorporation into your own system application. We can provide a lemo pigtail cable for this purpose.

Positionsensing detector

Do NOT use sunglasses, polaroid filters, smoked glass, exposed color film, X-ray film, or photographic neutral-density filters.

Dec 4, 2019 — AR coating is especially beneficial when used on high-index lenses, which reflect more light than regular plastic lenses. Generally, the higher ...

2. Make a Sun shield from a piece of cardboard. Cut a hole for one of the lenses. (You don’t need them both.) Then tape the shield to the front of the binoculars with the lens sticking through the hole. Use duct tape to seal any holes that leak light past the cardboard shield.

We've developed a unique position calibration routine which allows you to calibrate our QUAD-4TRACK system when working with a uniformly round laser beam. It requires the use of a micrometer-driven linear stage (1-axis only). As you can see from the calibration screen on the left, the procedure involves zeroing the instrument, moving the QUAD probe to nine discrete positions (+2.000 to - 2.000 mm) and then capturing the QUAD readings. It then determines correction coefficients (last column) and applies them to the raw data to arrive at "corrected positions". The QUAD probe is now calibrated!

Now you can watch a beautiful, bright, magnified image of the sun as the eclipse proceeds. You will have to adjust the tripod periodically to account for the Earth's rotation. A warning: give your binoculars a cooling break now and then. The eyepiece may become overheated and the lens elements may separate if you leave it pointed at the Sun for too long.

Meniscus means a crescent moon or an object shaped like it. Curved inward on one side and curved outward on the other side more strongly. Thicker in the ...

Laser beamdump

Pinhole images are pretty dim and small. You can magnify the Sun’s image by using a pair of binoculars. You MUST NOT look through the binoculars!

Use two pieces of cardboard. In one, cut a one-inch hole, then tape a piece of foil over the hole. Now make a pinhole in the middle of the foil. Use the other piece of cardboard (which should be white for best viewing) as a screen. With the Sun behind you, hold the pinhole cardboard as far from your screen as you can. The farther the pinhole is from the screen, the bigger your image will be.

If you can't keep yourself from looking directly at the Sun, be absolutely sure that you have the correct filter--a professionally designed white light filter that  blocks 99.999 percent of the sunlight. Just because a filter makes the Sun look dim does not mean that it’s blocking enough of the dangerous amount of sunlight that can permanently damage your eyes.

Use a tree. If you have shade trees in your location, try looking at the images of the Sun coming through the holes formed by the leaves. Use a piece of white cardboard to capture the images for a great viewing session!

2. Cut a one-inch hole in the center of one end of the box. Tape a piece of foil over the hole, then poke a small hole in the foil with a pin.

Water-cooledlaser beamdump

Solar viewing glasses—also called eclipse glasses—are an easy, affordable way to safely look at a solar eclipse. Without these special glasses, the Sun can permanently damage your eyes or cause blindness. We recommend that you DO NOT purchase eclipse glasses on Amazon or other third-party sites, as unscrupulous people have been selling glasses that do not meet the international standard for filters that allow for direct viewing of the Sun (even though they are sometimes marked as such). These counterfeit glasses could  damage your eyes.

Another very handy feature is "data logging". This allows you to set up the QUAD-4TRACK to follow the displacement, energy and/or power of your laser over several minutes, hours or even days. Need to measure the "beam steering" of your laser as it warms up? This is how you do it! Need to measure the beam displacement vs laser repetition rate or energy level? Data logging will help you measure it!

Applications typically run on the server, and accept input and display their output on the thin client display. LTSP5 was superseded by https://ltsp.org in 2019 ...

Never view the Sun with the naked eye or by looking through unfiltered optical devices such as binoculars or telescopes!

The QUAD-4TRACK is a laser position sensing system designed to support our unique pyroelectric quadrant detectors, QUAD-P and QUAD-E. It is a 4-channel microprocessor-based system that measures the voltage output of each QUAD element and does the math necessary to provide a measurement of the X and Y displacement of a laser beam or image. It is fast and can be used to track, align and/or measure movement in real time, with a resolution of just a few microns!

on Fresnel lenses can be seen from the following letters written by Augustin Fresnel to Monsieur Tassaert, Director of the Saint Gobain Glass Factory. Paris, ...

Laser power detector for measurement up to 50 000 W that traps > 97 % of the incident light and handles high intensities of small beams.

Use a colander. A colander, with its many holes, will give you fantastic, multiple images of the sun. Simply hold it about 20" above the ground. The images will look even better if you cast them onto a white piece of paper or sheet.

Portable laser power meter for up to 250 W with flexible calibration options so the customers only pay for what they use. Includes 3 measurement modes : SSP, CWP and SSE.