Novel spliced multispectral combined optical filter

Abstract

The invention discloses a novel spliced multispectral combined optical filter, which belongs to the technical field of hyperspectral imaging and is provided with a spliced substrate, a plurality of first optical filter units and second optical filter units distributed on two sides of the first optical filter units. The splicing substrate is provided with a plurality of placing grooves, and the first optical filter units and the second optical filter units are bonded in the placing grooves; wherein the first optical filter unit and the second optical filter unit are each provided with a plurality of spectrum channels, and a black film is plated between every two adjacent spectrum channels. According to the splicing substrate, the multiple optical filter units are reasonably spliced through the multiple containing grooves, and the containing grooves can provide good mechanical reference and positioning precision; the problem that the yield is reduced due to the increase of the number of spectrum channels is effectively solved, and the beneficial effects of high qualified rate of finished products and production cost saving are achieved.

Description

technical field [0001] The invention relates to the technical field of hyperspectral imaging, in particular to a novel spliced ​​multi-spectral combination filter. Background technique [0002] In recent years, with the rapid development of the economy and society, space optical hyperspectral cameras have become more and more widely used. Hyperspectral imaging technology can simultaneously obtain the geometric, radiation and spectral information of ground objects, integrating the capabilities of cameras, radiometers and spectrometers. Compared with two-dimensional imaging in optical space, spatial and spectral three-dimensional imaging of ground objects can be carried out. Under a certain spatial resolution, the unique continuous characteristic spectrum of ground objects in a wide spectral range can be obtained, which has great advantages in the fine classification and identification of ground objects. With outstanding advantages, it has become an important cutting-edge tech...

AI Technical Summary

Problems solved by technology

However, in order to achieve more spectral imaging for the same detector, it is necessary to increase the number of spectral channels, and at the same time reduce the spectral channel size of a single imaging optical path and the spacing between different spectral channels. At present, multi-channel spectral filters In most cases, the mask integration method is used. However, with the increase in the number of spectral channels, especially for multi-spectral filters with more than six channels, the yield of integrated filters drops sharply;

[0004] Therefore, how to solve the problem of low yield of multi-channel integrated optical filters in the prior art has become an important technical problem that those skilled in the art need to solve urgently

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