Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41G—WEAPON SIGHTS; AIMING
  • F41G1/00—Sighting devices
  • F41G1/32—Night sights, e.g. luminescent
  • F41G1/34—Night sights, e.g. luminescent combined with light source, e.g. spot light
  • F41G1/35—Night sights, e.g. luminescent combined with light source, e.g. spot light for illuminating the target, e.g. flash lights
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
  • G02B23/14—Viewfinders

Definitions

• the present invention relates to an optical device intended to be combined with a laser pointer target pointer in order to improve the visibility of a target inside a dark building using intensifying glasses. of light (commonly called night vision goggles).
• a laser beam target marker includes a laser generator generally emitting radiation located in the infrared range and equipped with a collimator which produces a narrow beam with very low divergence, which gives for example a cer ⁇ 35 mm light key at a distance of 100 meters -
• a device of this kind is certainly effective for night sighting, but inside a very dark building, the light power of the beam is so intense on a small surface it produces around the luminous point a dazzling halo of light which gives the operator the impression of operating in the fog and puts him in the im ⁇ possibility of correctly discerning the target.
• the present invention overcomes this drawback thanks to an optical device characterized by a divergent lens pierced in its center with a small diameter hole, intended to be placed opposite the window of a laser beam pointer in order to capture the laser beam with practically parallel rays of the pointer, the lens deflecting the laser rays which reach it around the central hole in order to produce a diverging beam while the rays which reach the central hole through it without being deflected so as to form a fine light brush of higher intensity which is used to mark a target.
• the divergent lens can be mounted in a window formed in a body intended to be slid over and to cover the head of a laser pointer target pointer. It can also be mounted in the head of a laser beam target pointer at the location of the usual window.
• Figure 1 is a perspective view of an exemplary divergence device according to the invention.
• Figure 2 shows the device of Figure 1 installed on an exemplary laser beam pointer.
• FIG. 3 represents an axial section of a vari ⁇ ante of exemplary execution of the device of FIG. 1.
• FIG. 4 shows an exemplary laser beam pointer with an axial section of the pointer head.
• FIG. 5 is an axial section of the device of FIG. 3 placed on the laser beam pointer shown in FIG. 4.
• FIG. 7 represents the head of an exemplary laser beam pointer in which a divergence device according to the invention is incorporated.
• FIGs 8 and 9 show two alternative embodiments of the divergent lens according to the invention incorporated in the head of a laser beam pointer.
• FIG. 1 there is shown an exemplary embodiment of the divergence device according to the invention. It is a device in the form of a cap intended to be fitted on the head of a laser beam pointer, as shown in FIG. 2.
• a laser beam pointer is a device commonly mounted on a gun to make a target visible or more visible in the dark.
• the divergence device designated as a whole by the reference sign 1, comprises a hollow body 2 of cylindrical general shape, open at one end and closed at its opposite end by a window 3 provided with a divergent lens 4 pierced in its center with a hole 5 of very small diameter, for example 0.5 millimeter.
• the body can be made of synthetic or natural material.
• the divergent lens 4 can be made of organic or inorganic material, and it can be treated with anti-reflection and / or anti-scratch.
• the window 3 with the divergent lens 4 is preferably separable from the body 2 for ease of use on a pointer as will be seen below.
• the window 3 is attached to the body 2 by a flexible cord 7 which makes it possible not to lose it when it is separated from the body.
• the stud 8 is designed to receive the window 3 when the diverging lens 4 is not used.
• Another embodiment could consist in providing a fixed, non-separable window 3.
• FIG. 3 represents an exemplary embodiment in which the window 3, separable from the body 2 of the cap 1, is suspended from a horizontal axis 7 tal fixed on lugs 9 integral with the body 2, the window 3 being mounted so as to be able to pivot around the above-mentioned axis 7.
• a divergence device as shown in FIG. 1 or 2 is intended to be slid over the head of a laser beam target pointer.
• Such an apparatus is known per se. It is in the form of an elongated box in which are housed a laser generator, a source of electrical energy for supplying the laser generator and a device for adjusting the axial position of the laser generator so that , when the pointer is fixed on a firearm, the axis of the laser beam coincides with the axis of the barrel of the weapon at a predetermined distance from it.
• FIG. 4 represents an exemplary model of laser beam pointer 10.
• the head 11 of the pointer has a window 12 through which the laser beam emitted by the barrel 16 of the laser generator exits. This is a beam with practically parallel rays.
• the window 12 is usually closed by a simple glass plate.
• FIG. 5 shows a divergence device 1 as shown in FIG. 3 placed on the head of the laser beam pointer 10 of FIG. 3.
• the divergent lens 4 is located opposite the window 12 of the pointer and intercepts the laser beam 13 leaving the window of the pointer.
• the laser rays which reach the part of the lens 4 around the central hole 5 pass through the lens by being deflected and they leave it by forming a strongly divergent beam 14 while the rays central lasers which reach the central hole 5 pass through it without deviation or spreading.
• the laser beam After passing through the divergent lens 4, the laser beam thus comprises a strongly divergent beam 14 surrounding a fine concentrated laser brush 15.
• the divergent beam 14 produces for example a light spot reaching two to three meters or more at a distance of twenty-five meters depending on the divergence adopted.
• the relatively strong divergence of the beam 14 has the effect of reducing the light intensity on a target and of illuminating the latter and the surroundings without producing glare. Not being dazzled, the operator is then able to recognize the target instantaneously and reliably with the additional advantage of allowing the operator to progress in absolute darkness using night vision goggles such as if he had an infrared flashlight.
• an operator can operate and aim at a target in the dark, inside a with the help of night vision goggles and without being dazzled.
• the operator when the operator wishes to operate outside (full moon), he only has to rotate the window 3 as shown in FIG. 6 in order to allow the normal laser beam 13 to pass from the target pointer, and under these conditions of use, the operator can have all the power of the laser beam.
• the window 3 is retained in the raised position by means of clips 9.
• the diverging lens 4 is a plano-concave lens.
• the lens can however be produced in a different form, for example in the form of a concave symmetrical lens.
• FIG. 7 represents in axial section the head of a target pointer 10 in which the window 12 is provided with a diverging lens 4 according to the invention, pierced in its center with a hole 5. of small diameter.
• a neutral lens 17 can be bonded to the flat face of the diverging lens 1 when the latter is piano-concave (FIG. 8) or to the flat edge of the diverging lens 1 when that -this is concave symmetrical ( Figure 9).

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• Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Astronomy & Astrophysics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Telescopes (AREA)
• Lasers (AREA)
• Laser Surgery Devices (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=3884227

Family Applications (1)

Country Status (4)

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Family Cites Families (6)

• 1990
  • 1990-06-01 CA CA002034501A patent/CA2034501A1/fr not_active Abandoned
  • 1990-06-01 EP EP90906788A patent/EP0432228A1/de not_active Withdrawn
  • 1990-06-01 US US07/635,118 patent/US5193031A/en not_active Expired - Fee Related
  • 1990-06-01 WO PCT/BE1990/000025 patent/WO1991000489A1/fr not_active Ceased

Non-Patent Citations (1)

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