CPC F41G 1/30 (2013.01) [F41G 1/033 (2013.01); F41G 1/20 (2013.01); F41G 1/28 (2013.01); F41G 1/38 (2013.01); F41G 1/473 (2013.01); G02B 23/105 (2013.01); G02B 27/30 (2013.01)] | 14 Claims |
[ 8. A dot sighting device, comprising:
an illumination element that irradiates light to form an image;
a reflection element that reflects at least a portion of the light irradiated by the illumination element;
a connecting element formed on a portion of the dot sighting device;
a housing having a first side portion that surrounds the reflection element and a second side portion, the illumination element being disposed at the second side portion;
wherein the dot sighting device is attachable to and detachable from a mount by the connecting element;
wherein the reflection element comprises a doublet, with a first surface, an interior second surface and a third surface;
wherein a radius curvature of the second surface is greater than a radius curvature of the third surface;
wherein the radius curvature of the second surface is greater than a radius curvature of the first surface; and
wherein the interior second surface comprises an aspheric surface having a conic coefficient.]
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