5/8/2023 0 Comments Definition crosshairsThe pattern is formed from lines that are 10 µm wide. The innermost circle is 1 mm in diameter, with each subsequent circle increasing in diameter by 1 mm. Our concentric circle reticles consist of a centered crosshair and ten numbered concentric circles. Positive Pattern Available in 19.0 mm, 21.0 mm, and 1" (25.4 mm) Diameters.Ten Numbered Concentric Circles Increasing in Diameter by 1 mm, Superimposed on a Crosshair.A few sample patterns are shown below, which can made positive or negative, as shown in the image directly below.įor a quote on custom test targets and reticles, please contact us at to Enlarge Our photolithographic coating process allows us to create chrome features down to 1 µm. Substrates can be cut to shape for your application. In addition to our catalog test targets and reticles offered from stock, we can provide custom chrome patterns on soda lime, UV fused silica, or quartz substrates from 8 mm by 8 mm up to 85 mm by 85 mm. These components have served a wide variety of applications, being implemented in microscopes, imaging systems, and optical alignment setups. We manufacture test targets, distortion grids, and reticles at our Thorlabs Spectral Works facility in Columbia, South Carolina. Our in-house photolithographic design and production capabilities enable us to create a range of patterned optics. Optical density of >6 430 nm for quartz substrates and select soda lime substrates.Optical densities of >3 430 nm for UV fused silica substrates and standard soda lime substrates.Substrates can be diced to custom shapes and sizes.Thorlabs also offers a selection of test targets, calibration targets, and stage micrometers for imaging systems. Once the pattern is defined, we chemically etch the substrates and clean them in a class 100 cleanroom. We use contact photolithography with a mask aligner to define the pattern on the glass substrate. Our extensive production capabilities enable us to provide solutions for imaging system calibration and measurements. The negative reticles use the same chrome coating to cover the substrates, leaving the patterns clear, and work well in back-lit and highly illuminated applications.Īll the parts shown here are manufactured at Thorlabs Spectral Works in Columbia, South Carolina. The positive reticles consist of high-reflectivity, vacuum-sputtered chrome patterns plated on clear substrates and are useful for front-lit and general applications. Many of our reticles are available with positive and negative patterns. ![]() UV fused silica provides excellent transparency from the infrared down into the ultraviolet. Because they are intended to be used in transmission, Thorlabs' line of reticles is made from a UV fused silica substrate, unlike our test targets, which are made from soda lime glass. ![]() The pattern provides a reference location and allows the imaged object to be centered. Reticles are optics designed for insertion in the eyepiece of an imaging system that superimpose either a crosshair or concentric circle pattern on the imaged object.
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