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Parameter determination method for multi-channel wavelength-variable polarization interference filter

An interference filter and parameter determination technology, which is applied in the field of optical devices, can solve problems such as long wavelength switching time, single channel, and inability to continuously tune frequency, and achieve the effects of strong environmental adaptability, large optical aperture, and small birefringence

Active Publication Date: 2019-04-16
深圳市合飞科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The object of the present invention is to propose a method for determining the parameters of a multi-channel variable wavelength polarization interference filter, which can provide Multi-channel, wavelength continuously adjustable polarized light

Method used

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  • Parameter determination method for multi-channel wavelength-variable polarization interference filter
  • Parameter determination method for multi-channel wavelength-variable polarization interference filter
  • Parameter determination method for multi-channel wavelength-variable polarization interference filter

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Embodiment 1

[0049] refer to figure 1 and figure 2 , this embodiment provides a method for determining the parameters of a multi-channel variable wavelength polarization interference filter. The polarization interference filter includes a polarizer 101, a phase delay crystal assembly 102, and an analyzer 103. The phase delay crystal assembly 102 includes N A crystal 102a, the polarization axis of the polarizer 101 is perpendicular or parallel to the polarization axis of the polarizer 103, polarized light is input through the polarizer 101, and then output through the analyzer 103 after being propagated through the phase delay crystal assembly 102;

[0050] The method for determining the parameters of the polarization interference filter includes:

[0051] Step S101, determine the output light intensity, and find the crystal thickness value satisfying the polarization interference condition and the first angle combination according to the output light intensity, the first angle combinatio...

Embodiment 2

[0091] In this embodiment, a method for determining parameters of a multi-channel variable-wavelength polarization interference filter is further described through specific application scenarios.

[0092] Taking ultraviolet light as an example, refer to figure 1 , the polarizer 101 adopts a quartz polarizing prism, the phase retardation crystal assembly 102 includes N ultraviolet quartz single crystals, and the analyzer 103 adopts a quartz prism, wherein the polarization axis of the quartz polarizing prism is perpendicular to the polarization axis of the quartz prism, and the phase retardation crystal The quartz single crystals in the component 102 have the same phase retardation, and the angle between the optical axis of the quartz single crystal and the polarization axis of the quartz polarizing prism is θ 1 , θ 2 ,... θ n .

[0093] The ultraviolet light passes through the polarizer 101, the polarized light is transmitted in the phase retardation crystal component, and t...

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Abstract

The present invention provides a parameter determination method for a multi-channel wavelength-variable polarization interference filter. The method includes the following steps that: output light intensity is determined, a crystal thickness value and a first angle combination which satisfy a polarization interference condition are searched according to the output light intensity, wherein the first angle combination includes included angles between the optical axes of various crystals and the polarization axis of a polarizer; the initial wavelength of the polarization interference filter is determined according to the crystal thickness value and the first angle combination; a desired output wavelength is determined, and a second angle between the normal direction of a phase retardation crystal component and a polarized light transmission path direction is calculated according to the desired output wavelength; the number of channels of the polarization interference filter is determinedaccording to the phase delay amount of the phase retardation crystal component; and parameters are set, so that multi-channel wavelength-variable output is realized.

Description

technical field [0001] The invention relates to the technical field of optical devices, in particular to a method for determining parameters of a multi-channel variable-wavelength polarization interference filter. Background technique [0002] In optical information collection and processing, optical filtering and spectrum analysis play an extremely important role. The optical filter device can select a specific spectrum or a combination of multiple separated spectrums to pass through, and is a key device for optical communication, spectral remote sensing imaging, and medical spectral diagnosis. [0003] At present, optical filter devices are mainly interference filters prepared by the principle of multi-film interference, or absorption filters prepared by dichroic materials. Interference filters and absorption filters are characterized by mature technology, high transmittance and excellent spectral response characteristics, but fixed wavelength is a shortcoming of filters,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J1/04
CPCG01J1/0429G01J1/0488
Inventor 刘金礼
Owner 深圳市合飞科技有限公司
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