Processing method of cemented prism

Abstract

The invention provides a processing method of a cemented prism. The cemented prism comprises a first optical lens; a second optical lens; a gluing layer, through which the first optical lens and the second optical lens are fixed into a whole; a plating layer, which is arranged on one or more side surfaces of the prism and covers the side part of the cementing layer, at least one part of the side surface of the first optical lens and at least one part of the side surface of the second optical lens; the processing method comprises the following steps: configuring the first optical lens and the second optical lens, and connecting the first optical lens and the second optical lens through the cementing layer; grinding and polishing the side surface of the prism; setting the plating layer on the side surface of the prism, wherein the thickness of the plating layer is 0.02-15 [mu] m; and polishing the plating layer so that the thickness of the plating layer can be controlled to be larger than 10 nm.

Description

technical field [0001] The invention relates to a processing method of a glued prism. Background technique [0002] A prism is a polyhedron made of transparent materials (such as glass, crystal, etc.). It is widely used in optical instruments, and prisms can be divided into several types according to their properties and uses. For example, in spectroscopic instruments, the "dispersion prism" that decomposes composite light into spectra is more commonly used as an equilateral prism; in instruments such as periscopes and binocular telescopes, changing the direction of light to adjust its imaging position is called "full prism". "Reflecting prisms" generally use right-angle prisms. [0003] Such as figure 1 As shown, the cemented prism in the prior art includes a first optical lens 10 , a second optical lens 20 and a glued layer 30 , and the first optical lens 10 and the second optical lens 20 are fixed through the glued layer. Such as figure 2 As shown, when the cemented...

AI Technical Summary

Problems solved by technology

like figure 2 As shown, when the cemented prism in the prior art is used, usually only the area within the dotted frame is selected as the working area. When the light passes through this area, the impact of scattering, reflection, or diffraction is usually reduced or has no impact, so The image of the glued layer 30 cannot be observed with the naked eye

In the area outside the dotted line frame, part of the light is directly emitted from the side of the glued layer 30 and cannot reach the second optical lens 20, and the side of the glued layer 30 may also form light spots or flare lines, especially on the side of the glued layer 30. The sides are recessed relative to the sides of the first optical lens 10 and the second optical lens 20, and scattering, diffraction and reflection may occur in the depressions, and the side of the glued layer 30 will have obvious flare lines, seriously affecting the image quality

In addition, the usable working area of ​​the surface of the first optic 10 may be less than 80%

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