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Selecting method and device of optical filter

A filter and chip technology, used in measuring devices, optical instrument testing, color/spectral characteristic measurement, etc.

Active Publication Date: 2018-06-05
BEIJING LUSTER LIGHTTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] This application provides a method and device for selecting an optical filter to solve the problem of accurate selection of transmittance when selecting an optical filter that has not been resolved in the prior art

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  • Selecting method and device of optical filter
  • Selecting method and device of optical filter
  • Selecting method and device of optical filter

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Embodiment Construction

[0022] see figure 1 , is a flow chart of a method for selecting an optical filter provided in this application. Such as figure 1 As shown, the method includes:

[0023] 101. Acquire a chip spectral characteristic curve of the imaging chip.

[0024] The imaging chip, also known as the photosensitive element, is the core of the imaging system. The role of the filter is to cooperate with the imaging chip to achieve a better imaging effect. Theoretically, for any imaging device, the selection of the filter depends on the spectral characteristics of the imaging chip. In the chip manual of the imaging chip, there is usually a spectral characteristic curve of the imaging chip, for example, the model is IMX265LQR-C imaging chip, and the spectral characteristic curve of the imaging chip is included in the chip manual of the chip provided by SONY, such as figure 2 As shown, the spectral characteristic curve mainly characterizes the spectral response of the chip in the visible ligh...

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Abstract

The invention discloses a selecting method and device of an optical filter and relates to the technical field of digital imaging to solve the problem of selecting the transmittance precisely in an optical filter model selection process in the prior art. The method primarily comprises the following steps: acquiring a chip spectral characteristic curve of an imaging chip; acquiring an ideal spectralcharacteristic curve; calculating a normalized spectral characteristic curve of the ideal spectral characteristic curve by adopting a normalization algorithm; and solving the transmittance of the optical filter according to the chip spectral characteristic curve and the normalized spectral characteristic curve. The method and device are primarily applied to a process of selecting the optical filter.

Description

technical field [0001] The present application relates to the technical field of digital imaging, in particular to a method and device for selecting an optical filter. Background technique [0002] The optical filter is an optical filter that uses precision optical coating technology to alternately coat high and low refractive index optical films on the optical substrate to achieve high light transmission in a certain band and cut-off or high reflection in other bands. That is to say, the filter is an optical device used to select the desired radiation band. Optical filters are mainly used in digital cameras, mobile phones, computer cameras, monitors, videophones, etc., to filter out a certain frequency band of light waves passing through the camera lens, and only allow light waves within a certain wavelength range to pass through. Take the infrared cut filter as an example to illustrate the function of the filter. The infrared cut filter is an optical filter that allows vi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B07C5/342G01N21/31G01M11/00
CPCB07C5/342G01M11/00G01N21/31
Inventor 刘淼姚毅
Owner BEIJING LUSTER LIGHTTECH