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A spectral calibration lighting device

A lighting device and spectral calibration technology, which is applied to fixed lighting devices, lighting devices, lighting device components, etc., can solve the problems of low energy utilization rate and low calibration efficiency, and achieve the effect of improving light energy utilization rate

Active Publication Date: 2019-03-08
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

However, the light outlet of the integrating sphere has a luminous solid angle of 2π, and only the light beam within a small angle range can be collimated, and most of the light energy will be scattered, and the energy utilization rate is low.
Or directly collimate the beam of the monochromator, and then obtain the calibration of the whole field of view by scanning, the calibration efficiency is not high

Method used

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  • A spectral calibration lighting device

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Embodiment

[0023] Example: A calibrated illumination beam with a diameter of Φ100mm and a field of view of 6° is required.

[0024] Firstly, the collimating mirror is determined to have a diameter of D=100mm, and the focal length is calculated according to the relative aperture 5*D, which is f=500mm, which is realized by a lens. The second scattering sheet is made of a diffractive scattering sheet. The object aperture angle of the collimating mirror is 2*atand(D / 2f)=11.4°, and the divergence angle of the scattering sheet is 12°, which is slightly larger than the object aperture of the collimating mirror. horn. The first scattering sheet adopts a diffractive scattering sheet with a divergence angle of 50°, then the distance between the scattering sheets L=f*tan(w) / tan(θ I ) = 56.2mm. Through the above device, the monochromatic thin beam can be shaped into a uniform illumination beam with a diameter of 100mm and a field of view of 6°, and the light energy utilization rate is greater than...

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Abstract

The invention discloses a spectral calibration lighting device which can be used for full-field and full-aperture spectral calibration of a spectral imager. The spectral calibration lighting device mainly comprises a first diffuser, a second diffuser and a collimating lens which are sequentially arranged along the optical axis; the distance L between the first diffuser and the second diffuser meets the demands of a field; the second diffuser is positioned at the focal position of the collimating lens; and the diffusing angle of the second diffuser is matched with the relative aperture of the collimating lens. The spectral calibration lighting device can shape a small-caliber monochromatic light beam into a specific-caliber field uniform lighting beam; through selection of the focal length and the caliber of the collimating lens, as well as the distance between the diffusers, the calibration requirements of different-index spectral imagers can be satisfied; and the spectral calibration lighting device has the characteristics of simple structure and high energy utilization ratio.

Description

technical field [0001] The invention relates to a spectral calibration illuminating device, which is suitable for spectral calibration of a full field of view and a full aperture of a spectral imager. Background technique [0002] Spectral calibration is used to determine the spectral curve position and response width of the spectral imager, which is of great significance for the quantitative and precise application of data. When performing spectral calibration, it is necessary to implement uniform monochromatic light illumination on the spectral imager with full aperture and full field of view. However, the general monochromatic light source——monochromator or laser, has a small beam aperture and a limited field of view, so it is difficult to directly It is used for spectral calibration, so it is necessary to shape the small-aperture monochromatic light source into a large-aperture uniform illumination beam. In actual calibration, monochromatic light is usually introduced i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F21S8/00F21V5/00F21V14/06G01J3/10
CPCF21S8/00F21V5/00F21V14/06G01J3/10
Inventor 李立波胡炳樑王爽李娟于建冬
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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