Manufacturing method of wedge-shaped lens

Abstract

The invention discloses a manufacturing method of a wedge-shaped lens, belonging to the technical field of optical cold processing. The manufacturing method comprises the specific steps of: manufacturing a wedge-shaped lens blank and a high-precision glass clamp by adopting a conventional optical processing technology so as to ensure that a first guide through face of the wedge-shaped lens as well as the surface shape and the surface defects of the wedge-shaped glass clamp meet formulated requirements; optically cementing the first light through face of the wedge-shaped lens onto the inclined surface of the wedge-shaped glass clamp which is already optically cemented onto a parallel planer optical cementing base plate, carrying out fine grinding and polishing on a second light through face of the wedge-shaped lens, and obtaining the wedge-shaped lens with second-level precision by controlling the thickness, the parallel difference and the surface shape precision of the second light through face and the parallel planer optical cementing base plate. The manufacturing method for machining the wedge-shaped lens, disclosed by the invention, not only has a simple process, strong operability and a greatly-prolonged manufacturing period, but also is easy to ensure the single-batch finished product ratio of wedge-shaped lens parts with small sizes, large angles and second-level precision and overcomes the difficulties of unstable quality, low efficiency and low finished product ratio in the conventional processing method.

Description

Technical field [0001] The invention belongs to the technical field of optical cold processing, and mainly relates to a method for manufacturing a wedge mirror, in particular to a new method for manufacturing a wedge mirror with small size, large angle and second-level accuracy. Background technique [0002] As we all know, a wedge mirror is composed of two optical planes with a small angle between them. It is a commonly used optical element in optical systems. Its wedge angle value and diameter wedge angle accuracy are generally decomposed according to the different technical indicators of different products and analyzed by optical Calculated by design. Generally, small-angle wedge mirrors (less than 1°) are mostly used to adjust the parallelism of the optical axis. In some optical systems, in order to achieve a large range of scanning, some small sizes (5mm~15mm) and large wedge angles (1°~ 5°), wedge-shaped mirror parts with high wedge angle accuracy (better than ±30"), that ...

AI Technical Summary

Problems solved by technology

Although each of the above-mentioned processing techniques has a certain scope of application and their own advantages and disadvantages, only the high-precision wedge-shaped glass fixture method is suitable for the processing of small-sized, large-angle, and second-level precision wedge-shaped mirror parts.

The processing principle of this process is that when the part is combined with the high-precision wedge-shaped glass fixture, the relationship between the completed wedge angle of the part and the wedge angle of the wedge-shaped glass fixture is used for processing. When the part is glued to the wedge-shaped glass fixture , Grinding off the excess parts, so that the parts can reach the required wedge angle. Therefore, the premise of the implementation of this process method is that there must be a wedge-shaped glass fixture with higher wedge angle precision, but the higher-precision wedge-shaped glass fixture itself has processing. Higher technical index requirements, more difficult processing, longer production cycle, lower processing efficiency and yield, high production cost, and not suitable for complex types of wedge mirrors and small processing volume in research projects

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