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Filter disk and light filter device in Archimedes spiral line shape and design methods thereof

An Archimedes spiral and design method technology, applied in the direction of filter, optics, optical components, etc., can solve the problems of shortening the service life of the motor, reducing the working efficiency, increasing the loss of the motor, etc., to ensure the effective structure and improve the work. Efficiency, the effect of ensuring stability

Active Publication Date: 2013-03-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It can be seen from the working principle of the filter wheel: since the filter needs to stop and wait for the detector to integrate, the motor does not rotate continuously when the filter wheel is used to achieve multi-band light splitting, so this reduces the work efficiency to a certain extent ; Moreover, this "stop and turn" design not only generates a lot of energy consumption, but also puts forward higher requirements for the performance of the motor, which increases the loss of the motor and shortens the service life of the motor

Method used

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  • Filter disk and light filter device in Archimedes spiral line shape and design methods thereof
  • Filter disk and light filter device in Archimedes spiral line shape and design methods thereof
  • Filter disk and light filter device in Archimedes spiral line shape and design methods thereof

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Embodiment 1

[0052] In order to solve the problem of low filtering time efficiency of the filter wheel, the present invention first proposes a filter device based on an Archimedes spiral filter disc, which includes an Archimedes spiral filter disc and detector;

[0053] Such as figure 2 As shown, the Archimedes spiral filter disc has a disc-shaped structure, and n' Archimedes spirals are drawn on the filter disc with the center of the filter disc as the starting point, and the n' Archimedes spirals will filter The optical disc is divided into n' filter areas, and each filter area is equipped with a filter; n' is the number of spectral bands of the filter disc; n' Archimedes spiral lines have the same shape; the detector adopts line-by-line readout For detectors in different ways, see image 3 .

[0054] The drive motor of the filter disc rotating at a uniform speed is used to drive the filter disc to rotate at a uniform angular speed, and the push-broom of the detector can be realized ...

Embodiment 2

[0057] In order to achieve the best push-broom effect for the Archimedes helical filter disc of the present invention, this embodiment proposes a design method for the Archimedes helical filter disc. Firstly, the shape of the Archimedes spiral is determined according to the size of the detector and the number of spectral bands. Secondly, the minimum radius of the filter disc is determined according to the radius of the effective filter area of ​​the filter disc, and the filter disc with the best push-broom performance is produced.

[0058] This embodiment is to design an Archimedes spiral filter disc with four optical filters, and use the Archimedes spiral filter disc and a certain type of platinum silicon infrared detector to form the Archimedes spiral filter The optical device, the wavelength range and transmittance of the filter are processed according to the actual application requirements.

[0059] The main parameters of the platinum-silicon infrared detector used in this...

Embodiment 3

[0106] This embodiment designs a kind of Archimedes helical filter device that can obtain good push-broom performance. The relative position between them; the concept of synchronous exposure error of filter disc is proposed, and the specific coordinates of detector placement are determined according to the principle of minimum synchronous exposure error.

[0107] In this embodiment, the design steps are as follows:

[0108] Step ⑴: Design the Archimedes helical filter disc by the above steps 1 and 2, the Archimedes helical filter device includes the filter disc and the detector used in conjunction with it, the detector in this embodiment is Detectors with row-by-row readout;

[0109] Step ⑵, in order to obtain a better push-broom performance for the detector, it is necessary to determine the position of the detector relative to the filter disk. First, place the detector in the first and second quadrants on the surface of the filter disk. Point A on the rectangular ABCD surfa...

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Abstract

The invention provides a filter disk and a light filter device in an Archimedes spiral line shape and design methods thereof, belonging to the field of multi-band imaging. The invention provides a filter disk in an Archimedes spiral line shape, wherein a light filter area is marked out on the filter disk according to an Archimedes spiral line marked out at the center of a circle of a disk surface; the invention designs a light filter device in an Archimedes spiral line shape through the application of the filter disk, wherein a detector in a row-by-row read-out manner is allocated; further, the invention provides a design method of the filter disk in an Archimedes spiral line shape, wherein the shape of the Archimedes spiral line is firstly determined according to the size of the detector and the number of light splitting wave bands, and then the semi-diameter of the filter disk is determined according to minimum polar diameter principle and safety factor principle; and the invention also provides a design method of the light filter device in an Archimedes spiral line shape, wherein the concept of synchronous exposure error of the filter disk is provided, and the relative position where the detector is placed is determined by using the minimum principle of synchronous exposure error. According to the filter disk and the light filter device in an Archimedes spiral line shape and the design methods thereof, the light filter efficiency can be improved, and the filter device and the light filter device are suitable for optical light-dividing devices.

Description

technical field [0001] The invention relates to an Archimedes spiral filter disc, a filter device and a design method thereof, which are suitable for optical splitting and belong to the field of multi-band imaging. Background technique [0002] The filter wheel is a common device to achieve multi-band spectroscopy. Multiple groups of optical filters are mounted on the optical filter wheel, and the rotating motor controls the rotation of the optical filter wheel, so that the incident radiation can be divided into optical radiation of different bands. [0003] At present, multi-spectral imaging products with less than 10 spectral bands mostly use filter wheels, such as figure 1 shown. The infrared spectrum imager Orion SC7000 of FLIR in the United States adds a rotating filter wheel before the focal plane of the lens. The filter wheel is equipped with 8 filters, and the spectral response range is 3-5μm and 7-9μm; Canada Telops The company's TEL-1000 series mid-wave infrared...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20G02B27/00
Inventor 王岭雪刘亚欣蔡毅吴新社薛唯罗秀丽高岳
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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