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Full-wave-band achromatism filter type spectral camera

A differential filter type, spectral camera technology, applied in the field of spectral remote sensing imaging, can solve problems such as image distortion, inability to meet the needs of full spectral band chromatic aberration elimination, and errors in results.

Inactive Publication Date: 2015-06-17
SICHUAN DUALIX SPECTRAL IMAGING TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The focal length change of different color lights caused by the secondary spectrum cannot be less than 2 / 1000 of the focal length, that is to say, the longer the focal length of the lens, the less the achromatic aberration can meet the requirements
None of these lenses can meet the need for full-spectrum chromatic aberration cancellation
However, when LCTF with a certain thickness is added between the lens and the camera, the image will be distorted, chromatic aberration, etc., and then the adjustment of the focal length is realized by adjusting the lens. Since the scale value will no longer be accurate, the obtained results will inevitably have errors. Causes problems such as the image is not clear enough

Method used

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  • Full-wave-band achromatism filter type spectral camera
  • Full-wave-band achromatism filter type spectral camera
  • Full-wave-band achromatism filter type spectral camera

Examples

Experimental program
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Effect test

Embodiment 1

[0047] A full-band achromatic filter type spectral camera, the spectral camera includes an optical lens 1, a liquid crystal tunable filter LCTF2 and an area array camera 3, the optical lens 1, a liquid crystal tunable filter LCTF2 and an area array camera 3 in sequence set, and the optical lens 1 is fixedly connected to the liquid crystal tunable filter LCTF2, and the liquid crystal tunable filter LCTF2 and the area scan camera 3 are separated from each other and set separately. An electronically controlled translation mechanism 4 is arranged below the area array camera 3, wherein the translation platform 43 of the electronically controlled translation mechanism 4 is connected and fixed to the bottom of the area array camera 3, and the signal output port of the area array camera 3 is connected to the control board of the electronically controlled translation mechanism 4. electrical connection. A controller 5 is also provided, and the controller 5 is electrically connected to t...

Embodiment 2

[0050] On the basis of Embodiment 1, it also includes an LCTF controller, and the LCTF controller is electrically connected to the controller 5 and the liquid crystal tunable filter LCTF2; the control signal generated by the controller 5 is sent to the LCTF controller and controlled by the LCTF controller The transmission wavelength of the light passing through the liquid crystal tunable filter LCTF2. The controller 5 generates a corresponding control signal according to whether the sample image recorded on the area detector is clear. The control signal is divided into two signals and sent to the electronically controlled translation mechanism 4 and the LCTF controller respectively. The electronically controlled translation mechanism 4 Drive the translation stage 43 and the area array camera 3 to move, and the LCTF controller controls the control voltage of the liquid crystal tunable filter LCTF2 according to the control signal, so that the liquid crystal tunable filter LCTF2 k...

Embodiment 3

[0052] Based on the above embodiments, the electronically controlled translation mechanism 4 includes a drive motor 41 , a translation platform drive shaft 42 and a translation platform 43 . The driving motor 41 is a stepper motor, and when a signal is input to the driving motor 41, the driving motor 41 will rotate at a certain angle correspondingly. The driving motor 41 transmits the motion to the translation platform 43 through the translation platform drive shaft 42, so that the translation platform 43 can move along the optical axis. The output shaft of the drive motor 41 and the translation platform drive shaft 42 are driven by belts, gears or chains, and the translation platform drive shaft 42 and the translation platform 43 are driven by a rack and pinion. In this embodiment, the output shaft of the drive motor 41 and the translation table drive shaft 42 are driven by a belt.

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Abstract

The invention discloses a full-wave-band achromatism filter type spectral camera, belongs to a filter type spectral camera in the technical field of spectral cameras, and aims to provide a full-wave-band achromatism filter type spectral camera capable of eliminating the aberration of any wave band. The full-wave-band achromatism filter type spectral camera comprises an optical lens, a liquid crystal adjustable light filter (LCTF), an area-array camera and a controller, wherein the optical lens is fixedly connected with the LCTF; the LCTF is separated from the area-array camera; an electric control translation mechanism is arranged below the area-array camera; a translation platform of the electric control translation mechanism is connected with the area-array camera; the controller is electrically connected with the LCTF and the electric control translation mechanism; the electric control translation mechanism can drive the translation platform and the area-array camera to move together along the optical axis direction; the distance between the LCTF and the area-array camera can be adjusted, so that a clear sample image can be recorded on the area-array camera, and full-wave-band achromatism is realized.

Description

technical field [0001] The invention belongs to the technical field of spectral remote sensing imaging, and relates to a filter-type spectral camera, in particular to a full-band achromatic filter-type spectral camera. Background technique [0002] Hyperspectral imaging technology is an image data technology based on very narrow bands developed in the past two decades. Its most prominent application is in the field of remote sensing detection, and it has greater application prospects in more and more civilian fields. It integrates advanced technologies in the fields of optics, optoelectronics, electronics, information processing, and computer science. It is an emerging imaging technology that organically combines traditional two-dimensional imaging technology and spectroscopy technology. [0003] Hyperspectral remote sensing is the cutting-edge technology of remote sensing. Its spectral resolution is up to the order of nanometers. The images obtained through hyperspectral im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/42G01J3/02
Inventor 陈兴海刘业林
Owner SICHUAN DUALIX SPECTRAL IMAGING TECHNOLOGY CO LTD
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