High-precision optical film absorption axis measuring device

Abstract

The invention belongs to the field of optical detection, and particularly relates to a high-precision optical film absorption axis measuring device which comprises a measuring workbench, a light source module, a depolarizer, a standard polarization module, a product carrying table for placing the optical film to be tested, a photoelectric detector and a data processing module electrically connected with the photoelectric detector, and only the optical film to be tested needs to be placed in the product carrying table during use, after the light emitted by the light source module sequentially passes through the depolarizer, the standard polarization module, the optical film to be tested in the product carrying table, the light is incident to the photoelectric detector to result in the photoelectric effect, the data processing module acquires the angle of the absorption axis of the optical film to be tested according to the photoelectric effect of the photoelectric detector, and the light emitted by the light source module is filtered into non-polarized light after passing through the depolarizer, so that the influence on the measurement result is avoided, the measurement precision is high. The device is simple in integral structure, easy to install and use and maintain in the later stage, low in manufacturing and using cost, time and labor saving, high in working efficiency, andwide in application prospect.

Description

technical field [0001] The invention belongs to the field of optical detection, in particular to a high-precision optical film absorption axis measuring device. Background technique [0002] Optical film is composed of thin layered medium, a type of optical medium material that transmits light through the interface, usually refers to the film used as a component of optical device and other optical purposes, the application of optical film began in the 1930s. Nowadays, optical films have been widely used in the fields of optics and optoelectronics to manufacture various optical instruments, and various optical films are used in optical devices such as image display devices, and a representative example is polarizing plates used in liquid crystal display devices. A polarizing plate is usually a laminated optical film in which a protective film is attached to at least one surface of a polarizing film. Moreover, the polarizing film which comprises a polarizing plate, and a prot...

AI Technical Summary

Problems solved by technology

[0003] In the traditional measurement method, the absorption axis of the optical film is mainly measured by a polarizing prism. This measurement method mainly has the following defects: (1) The polarizing prism itself produces linearly polarized light, and the direction of the linearly polarized light will affect Therefore, the requirements for the polarizing prism are very high, resulting in high manufacturing costs; (2) The installation accuracy of the polarizing prism is very high, and a slight installation error will lead to inaccurate calibration and affect the measurement accuracy; (3) The measurement process It requires a lot of manpower and material resources, high labor cost, time-consuming and labor-intensive, low measurement efficiency, and high requirements for operators

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