Linear gradient optical filter of 0.4 to 1.1 micrometers and preparation method thereof

A linear gradient filter and substrate technology, which is applied in the field of optical systems, achieves the effects of simple manufacturing process, portability and high integration

Inactive Publication Date: 2010-04-07
NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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Problems solved by technology

[0004] The purpose of the present invention is in order to solve the problem that the central wavelength of the optical filter on the substrate changes linearly with the position of the sub

Method used

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  • Linear gradient optical filter of 0.4 to 1.1 micrometers and preparation method thereof
  • Linear gradient optical filter of 0.4 to 1.1 micrometers and preparation method thereof

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Embodiment Construction

[0023] The linear gradient filter of a 0.4-1.1 micron linear gradient filter of the present invention uses K9 glass as a coating base, and titanium dioxide and silicon dioxide as coating materials. The film system adopts three-half-wave film system, and the designed film system is

[0024] K9 / (LHLH2LHLH) 3 / Air.

[0025] Wherein H and L are the 1 / 4 wavelength optical thicknesses of titanium dioxide and silicon dioxide of high and low refractive index materials respectively.

[0026] Its concrete preparation method is as follows:

[0027] (1) Clean the vacuum chamber: Use a vacuum cleaner to remove the film layer that has fallen off in the vacuum chamber, and then wipe the inner wall of the vacuum chamber with a degreasing gauze dipped in absolute ethanol;

[0028] (2) Ultrasonic cleaning of the substrate: put the substrate into a glass container, ultrasonically clean the substrate with analytical pure acetone for 10 minutes, then ultrasonically clean it with analytical pure...

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Abstract

The invention relates to a linear gradient optical filter of 0.4 to 1.1 micrometers and a preparation method thereof, which belongs to the field of optical systems. The linear gradient optical filter takes K9 glass as a film coating substrate and takes titanium dioxide and silicon dioxide as a film coating material; and the design coating of the linear gradient optical filter is K9/(LHLH2LHLH)3/Air, wherein H and L are respectively the titanium dioxide and the silicon dioxide with 1/4 wavelength optical thickness of a high and lower refractive index material; a linear gradient optical filter line is provided with 10 channels on a wave band of 0.4 to 1.1 micrometers, the relative bandwidth is 6.8 percent, and any position at the middle of a substrate only transmits one kind of light with a specific wavelength within 0.4 to 1.1 micrometers. The linear gradient optical filter is combined with an array detector, optical systems and mechanic systems of instruments can be simplified, and the reliability and stability of the instruments are improved so that the instruments are miniaturized and convenient to carry; and more importantly, the linear gradient optical filter can identify different optical radiations simultaneously and quickly detect different spectral radiance at the same time.

Description

technical field [0001] The invention relates to a 0.4-1.1 micron linear gradient filter and a preparation method thereof, belonging to the field of optical systems. Background technique [0002] Ordinary optical filters are generally in the form of a single channel. When multiple channels are required, splicing technology is often used to make multi-channel optical filters. The manufacturing process of this combination filter is complicated, and its performance is also unstable, so it is difficult to meet the requirements of high reliability and long life. [0003] Compared with combined filters, linear gradient filters do not require stitching, have high integration, relatively simple manufacturing process, passband can be designed arbitrarily in principle, stable performance, and can be precisely coupled with detectors. It is the development of ultra-narrow-band filters. of a trend. Contents of the invention [0004] The purpose of the present invention is in order to ...

Claims

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Application Information

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IPC IPC(8): G02B5/20G02B27/00B08B3/12B08B11/04
Inventor 陈焘王多书熊玉卿刘宏开叶自煜王济洲
Owner NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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