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Dielectric film transmission type spatial narrowband filter combined device

A narrow-band filter and dielectric thin film technology, applied in the direction of optical filters, optical components, optics, etc., can solve the problem of low transmission beam space and achieve the effect of good angular spectrum selection characteristics

Inactive Publication Date: 2016-05-04
郑光威
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As far as I know, no one has designed to use two identical dielectric films to realize the transmission-type beam spatial low-pass filtering characteristics

Method used

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  • Dielectric film transmission type spatial narrowband filter combined device
  • Dielectric film transmission type spatial narrowband filter combined device
  • Dielectric film transmission type spatial narrowband filter combined device

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Embodiment Construction

[0013] The present invention will be described below in conjunction with a specific example of a dielectric film transmission type spatial narrow-band filter combination device with a center wavelength of 1064 nm. But it should not limit the protection scope of the present invention.

[0014] see first figure 1 , figure 1 It is a schematic cross-sectional view of Embodiment 1 of the dielectric thin film transmission type spatial narrowband filter combination device of the present invention. It can be seen from the figure that the dielectric thin film transmission type spatial narrowband filter combination device of the present invention includes two long-wave pass-cut-off transmission filters with the same structure. Type filter, the cut-off angle of the filter is greater than 45 degrees, the angle between the two filters is greater than 90 degrees, and less than twice the cut-off angle.

[0015] The long-wave pass cut-off filter 4 placed at an inclination θ and the long-wav...

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Abstract

A dielectric film transmission type spatial narrowband filter combined device is characterized by comprising a first long-wave-pass transmission cut-off filter and a second long-wave-pass transmission cut-off filter in sequence in the light path incidence direction, wherein the first long-wave-pass transmission cut-off filter and the second long-wave-pass transmission cut-off filter are the same in structure and consistent in angular spectrum selectivity, the cut-off angle is larger than 45 degrees, the included angle of the first cut-off filter and the second cut-off filter is larger than 90 degrees and smaller than the value two times the cut-off angle, and each long-wave-pass transmission cut-off filter is composed of a plurality of layers of dielectric film transmission cut-off filters or Rugate film transmission cut-off filters. The angular spectrum selectivity bandwidth of the dielectric film transmission type spatial narrowband filter combined device reaches the sub-milliradian level.

Description

technical field [0001] The invention designs an optical filter combination device, in particular a dielectric thin film transmission type spatial narrow-band filter combination device. Background technique [0002] Lasers have the characteristics of high brightness, good coherence, and good directionality, making them widely used in many fields, especially high-power lasers play an important role in industrial processing, inertial confinement nuclear fusion, and national defense and military fields. The development of laser technology is inseparable from the development of optical instruments. As high-power lasers move towards higher power, various indicators of optical instruments, such as: anti-light damage threshold, spectral selection characteristics, and angular spectrum selection characteristics are proposed. higher requirements. [0003] In high-power laser systems, dielectric thin films, as good spectral and angular spectral selective devices, play a decisive role i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20
CPCG02B5/201
Inventor 郑光威
Owner 郑光威
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