Reflex luminous dot sighting instrument with undesired dot light blocking
OwnerAlfred C. DePaoliinventor
Life of this patent
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Abstract
In a reflex luminous dot firearm sighting instrument that includes a housing having an objective end and an ocular end defining an optical axis, an LED and a battery and control circuit for the LED and a tilted reflecting window or lens in the housing having a reflective coating that reflects the LED light while transmitting target light so that the target viewed through the instrument has a luminous dot of LED light superimposed thereon, a contoured non-reflective surface is provided alongside the luminous dot light path between the LED and the tilted reflecting window or lens inside the instrument for blocking undesired reflections of LED light so that they do not reach the eye.
Claims19
In a sighting instrument used by an observer for sighting a device on a target, that includes a housing having an objective end and an ocular end defining an optical axis, an aperture at said objective end of said housing for admitting light from a target view along said optical axis, a source of luminous dot light off of said optical axis, means along said optical axis for reflecting said luminous dot light while transmitting said target view light, said luminous dot light from said source being directed along a luminous dot light path to said means for reflecting, whereby said target view and said luminous dot are visible to an observer's eye at said ocular end of said housing along said optical axis with said luminous dot superimposed on said target view, the improvement comprising,
- (a) means for blocking undesired reflections of luminous dot light so that said undesired reflections of luminous dot light do not reach said observer's eye, including,
- (b) a contoured non-reflective surface alongside said luminous dot light path.
In a luminous dot sighting instrument used by an observer to sight a device on a target, that includes a source of luminous dot light, a tilted, coated window that reflects said luminous dot light while transmitting light from said target and means providing a luminous dot light path from said source of luminous dot light to said tilted coated window, to the observer's eye and a target light path from said target through said tilted coated window to said observer's eye, so that said target light and said luminous dot light are visible to said observer's eye with said luminous dot superimposed on said target, the improvement comprising,
- (a) means including a contoured non-reflective surface alongside said luminous dot light path between said source of luminous dot light and said tilted, coated window, for blocking undesired luminous dot light so that it is not visible to the observer.
Dependencies are inferred from the claim text.