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Reticles are insertion in the eyepiece of an imaging system that superimpose either a crosshair or concentric circle pattern on the imaged object. The pattern provides a reference location and allows the imaged object to be centered.Many of reticles are available with positive and negative patterns.
The positive reticles consist of low-reflectivity, vacuum-sputtered chrome patterns plated on clear substrates and are useful for front-lit and general applications.
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.
Reticles are available in a wide range of patterns, including crossline, micrometer scales, or grids.The masks used in mask lithography are very precise. DELN can be used to make gratings, microlens arrays, pttern, and a wide variety of other optics.
