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(Total 5 Products for When Was Optical Lens Made)
The ridge prism can rotate and reverse the image and deflect light with a 90 ° bend. It is suitable for telescopes and any optical instrument that needs to flip the image from the objective lens, open the right side and bend at 90 ° to maintain the correct visual direction. Amisi roof prism is named after the inventor...
Double-Concave (DCV) Lenses have two inward curved surfaces and a negative focal length. They are used for image reduction and to spread light. Double concave lens is similar to flat concave lens. The focal length is negative, but the light incident in parallel diverges outward. The curvature radii of the two sides of...
The variant of pentaprism is roof pentaprism, which is usually used in monocular camera. In this case, because the image projected on the fuselage will rotate 180 ° after the lens is focused, the light beam reflected from the plane mirror to the pentaprism after the focus also needs to change the left-right...
The chemical properties of BK7 are very stable, so it possesses scratch resistance and corrosion resistance. Meanwhile special grinding and polishing processes are not required, thereby reducing manufacturing costs. BK7 has a high degree of purity and homogeneity. It is nearly free of bubbles and inclusions. The BK7...
The reflection inside the prism is not caused by total reflection, because the angle of the incident light at the time of reflection is less than the critical angle, that is, the minimum angle of total reflection, so both reflecting surfaces should be plated as reflecting mirrors; The incident and outgoing surfaces...
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