Combined day and night weapon sight

a weapon sight and day and night technology, applied in the field of night vision devices, can solve the problems of indicating the location of the shooter, the disadvantage of laser aiming devices, and the disadvantage of producing an unnatural image, and achieve the effect of the same optical path length

Inactive Publication Date: 2007-09-27
FLIR SURVEILLANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0012] The present invention provides a combination day and night observation device that is particularly suited for use as a sight for a firearm, but which may also be used for observation. The invention includes an image intensifying sensor/display combination and a daytime optical path length compensator having substantially the same optical path length as the image intensifying sensor/display combination. For the purpose of this description, two day/night sight components have substantially the same optical path if the substitution of one component for the other does not require a change in eith

Problems solved by technology

The use of a light source to illuminate the target—whether visible light or infrared—has the disadvantage of indicating the location of the shooter.
Laser aiming devices carry the same disadvantage.
Thermal infrared imaging, which does not require a light source, has the disadvantage of producing an unnatural image.
Light gathering and intensifying night vision devices produce natural images, but are only useful to the extent that there is available light to gather and intensify.
The use of tritium illuminated sights, while making the sights more visible, fails to illuminate the target even if the tritium—illuminated aiming reticle is within a telescopic sight providing light gathering and magnific

Method used

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Examples

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Embodiment Construction

[0030] The present invention provides a night vision device intended to serve as a combination day and night sight for a firearm, although it can also be used for observation. The combination day and night sight 10 is illustrated in FIG. 1-2. The sight 10 includes a housing 12 having a forward end 14 and a rearward end 16.

[0031] An objective lens 18 is housed within the forward end 14. In some embodiments, the objective lens 18 may be a coaxial objective lens having a central portion 20 structured to transmit visible light, and an annular portion 22 structured to transmit infrared light or other wavelengths. Alternatively, the objective lens 18 may have a cutaway section as disclosed in U.S. patent application Ser. No. 11 / 011,671, filed Dec. 14, 2004.

[0032] An optional beam splitter 24 may optionally be disposed behind the objective lens 18. The beam splitter 24 includes a dichroic surface 26 structured to transmit light of certain wavelengths, for example the visible spectrum, an...

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PUM

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Abstract

A combination day/night sight includes an image intensifying sensor/display combination and a daytime optical path length compensator that may be selectively placed within the optical path. Use of the optical path length compensator when the image intensifying sensor/display is not being used eliminates the need for moving optical elements. The night sight therefore requires no change in focus or bore sight adjustment after switching between day and night operations.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to night vision devices. More specifically, the present invention provides a combined day and night sight capable of providing an intensified and potentially magnified sight picture at night or under poor viewing conditions, and a potentially magnified sight picture in more favorable light and viewing conditions. [0003] 2. Description of the Related Art [0004] The use of a light source to illuminate the target—whether visible light or infrared—has the disadvantage of indicating the location of the shooter. Laser aiming devices carry the same disadvantage. Thermal infrared imaging, which does not require a light source, has the disadvantage of producing an unnatural image. Light gathering and intensifying night vision devices produce natural images, but are only useful to the extent that there is available light to gather and intensify. The use of tritium illuminated sights, while making...

Claims

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Application Information

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IPC IPC(8): F21V9/04
CPCF41G3/165G02B23/12
Inventor POCHAPSKY, EUGENE
Owner FLIR SURVEILLANCE
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