Rectangular linear variable optical filter manufacturing method and device

Abstract

The invention relates to a rectangular linear variable optical filter manufacturing method and device. According to the rectangular linear variable optical filter manufacturing method and device, a glass base material used for making an optical filter is fixed on a lower surface of a round plate-shaped work piece disc that can rotate around a central shaft of the work piece disc, a plating face of the glass base material faces downwards, an evaporation source base plate and an evaporation source positioned on an upper surface of the evaporation source base plate are arranged below the work piece disc, and the plating face of the glass base material is subjected to plating operation with a membrane material evaporated via the evaporation source when the work piece disc drives the glass base material to rotate. The rectangular linear variable optical filter manufacturing method and device can help overcome defects of complicated production processes and low precision and poor quality of manufactured rectangular linear variable optical filters in conventional rectangular linear variable optical filter manufacturing processes because a corrected piece which is adjusted via manual work for many times is adopted. The rectangular linear variable optical filter manufacturing method and device are advantaged by greatly reduction of membrane thickness correcting processes, saved trial-plating time, and improved precision and quality stability of the rectangular linear variable optical filter.

Description

technical field [0001] The invention relates to a method for producing a rectangular linear gradient filter and a production device thereof. Background technique [0002] At present, optical thin film filters have been used in many fields such as spectral measurement, remote sensing technology, fluorescence analysis, and laser countermeasures. With the development of the optical industry, the requirements for optical filters are getting higher and higher, and some special optical filters have appeared, and the linear gradient filter is one of the new development directions. [0003] Linear gradient filter is a special kind of filter, the central wavelength or light intensity of different positions on the filter is not the same. Its function is to make the transmittance of light meet a specific functional relationship, which is used to improve imaging quality, correct aberrations, and provide illumination compensation. As an optical thin-film device whose spectral character...

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Problems solved by technology

[0006] In order to overcome the shortcomings of complicated production process, poor precision and unstable quality of the manufactured rectangular linear gradient filter due to the use of a correction sheet adjusted by many manual experiences in the preparation process of the existing rectangular linear gradient filter, The invention provides a method for producing a rectangular linear gradient filter and its production device, which has the advantages of greatly simplifying the film thickness correction process, saving trial plating time, and improving the precision and quality stability of the rectangular linear gradient filter

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