Tri-propellant total internal reflection prism for infrared target simulators

An infrared target and total reflection technology, applied in the field of TIR) prisms, can solve the problems of beam modulation, lower system energy utilization rate, large structure size, etc., and achieve the effect of improving contrast, improving energy utilization rate, and compact structure

Inactive Publication Date: 2014-09-10
徐熙平 +1
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  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, optical engines including visible light bands use two-element TIR prisms for light splitting, and do not modulate the light beams in the "off" state of the DMD, and the overall system size is large, which reduces the energy utilization of the system.
If the TIR prism is not used, in order to ensure the energy utilization rate, it is necessary to make the projection system and the lighting system have an angle of 24o between the optical axes, so that the apertures of the projection system and the lighting system are mutually restricted. In addition, in order to ensure that the lighting path is not blocked, it is necessary Increase the rear working distance of the projection system and increase the design difficulty of the projection system

Method used

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  • Tri-propellant total internal reflection prism for infrared target simulators
  • Tri-propellant total internal reflection prism for infrared target simulators
  • Tri-propellant total internal reflection prism for infrared target simulators

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Embodiment Construction

[0043] The three-component infrared TIR prism used in the optical engine of a DMD-based infrared target simulator of the present invention fully utilizes the characteristics that total reflection will occur when light is incident from an optically dense medium to an optically sparse medium, and by accurately calculating the prism oblique The side tilt angle realizes the modulation of the DMD "on" and "off" states. By selecting different infrared materials, it can be used in the optical engine of the infrared target simulator whose working band is the mid-wave infrared band of 3-5 μm and the working band of the long-wave infrared band of 8-12 μm.

[0044] Its optical path modulation process can be summarized as:

[0045] Such as figure 2 , the illumination beam is incident on the prism 20, totally reflected at 23, and incident on the DMD. When the DMD is in the "on" state, the reflected light is received by the projection system after passing through the prisms 21 and 22; whe...

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Abstract

The invention discloses a tri-propellant infrared total internal reflection (TIR) prism for infrared target simulators. The tri-propellant infrared TIR prism is composed of three prisms. On / off state of a DMD is modulated by making full use of total reflection of light when light enters an optically thinner medium from an optically thicker medium and by precisely calculating the dip angles of bevel edges of the prisms. By selecting different infrared materials, the tri-propellant infrared TIR prism can be used in optical engines of infrared target simulators of which the operating band is 3-5micron medium-wave infrared band and optical engines of infrared target simulators of which the operating band is 8-12micron long-wave infrared band.

Description

technical field [0001] The invention relates to a three-component total internal reflection (Total Internal Reflection, TIR for short) prism used for an infrared target simulator, especially a TIR prism used for an optical engine of an infrared target simulator based on a DMD scene generation device . Background technique [0002] With the emergence of infrared imaging guided missiles, in order to test and evaluate the performance of the seeker, it is urgent to develop infrared imaging hardware-in-the-loop simulation technology. The core of infrared imaging hardware-in-the-loop simulation technology is the infrared target simulator. As the key component of the infrared target simulator, the infrared optical engine determines most of the performance parameters of the infrared target simulator, including contrast, resolution, spatial uniformity, etc. . Since DMD has certain advantages over other scene generators in terms of resolution, spatial uniformity, frame rate and othe...

Claims

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Application Information

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IPC IPC(8): G02B17/08G02B5/04G02B1/00
Inventor 徐熙平乔杨刘涛母一宁
Owner 徐熙平
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