Single lens reflex semipermeable membrane lens and preparation method thereof

Abstract

The invention relates to a single lens reflex semipermeable membrane lens and a preparation method thereof, belonging to the technical field of the optical equipment. The lens comprises a semipermeable membrane lens main body. The lens is characterized in that the thickness of the lens main body is less than 0.1mm; the materials of the lens include crystal, sapphire and toughened grass; the bottom side of the lens main body is provided with hollow matrix; the top of the semipermeable membrane lens main body is provided with a hollow top cover; the membrane is embedded between the drop grooves of the hollow matrix; a cushioning material is doped in the edge part of one side of the membrane; and the hollow matrix is opposite to the hollow-out part of the hollow top cover. The processing method of the semipermeable membrane lens comprises the following steps: firstly using a diamond cutter to cut the lens main material into slices, seocndly grinding a main material slice to 0.03-0.04mm, coating a membrane; and finally processing the obtained semipermeable membrane lens to a matrix-type membrane, adding a frame around the membrane, and fixing to obtain the semipermeable membrane lens of the invention. The thickness of the single lens reflex semipermeable membrane lens is thin, thus the focus of the background light can be accurately corrected and the focus can be formed accurately on the photographic film or pixels. Meanwhile, the lens of the invention has high anti-damage capability and can not absorb impurities easily. After the semipermeable membrane lens is used for long time, the performance of the lens can not be degraded and the transmissivity of the lens can not be reduced.

Description

technical field [0001] The invention relates to a lens and a preparation method thereof, in particular to a semi-transparent film lens of a single-lens reflex camera and a preparation method thereof, belonging to the technical field of optical equipment. Background technique [0002] The semi-transparent film lens is a lens that is placed on the optical axis of the scene light passing through the camera lens system and forms an angle of about 45 degrees with the optical axis. According to the type of camera, there are two types of semi-transparent film lenses, one is the type that maintains the same position during shooting, and the other is the type that can adjust its position at the outer end of the scene optical axis during shooting. According to the material of semi-transparent film lenses, there are usually two types. In the past, semi-lenses made of ordinary glass were common, or polymer films are now used. [0003] Looking further, a semi-transparent film lens is ma...

AI Technical Summary

Problems solved by technology

Moreover, the performance of the polymer film will deteriorate due to long-term use, especially the disadvantage that the transmittance will decrease after long-term use.

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