| CPC G02B 23/10 (2013.01) [F41G 1/38 (2013.01); F41G 1/473 (2013.01); F41G 3/065 (2013.01); G02B 23/14 (2013.01)] | 14 Claims |
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1. A sight device, comprising:
a housing comprising a first end, a second end opposite to the first end, an external surface and a second central axis;
an objective lens unit disposed at the first end of the housing;
an ocular lens unit disposed at the second end of the housing and opposite to the objective lens unit;
an erector unit disposed between the objective lens unit and the ocular lens unit;
an adjusting unit movably disposed on the housing and radially propped against the erector unit to adjust the erector unit;
a light emitting unit which is disposed on the erector unit and comprises a light source for emitting a light beam to an object;
a light receiving unit which is disposed on the erector unit and comprises a light sensor for receiving the light beam reflected by the object;
wherein, in any cross section of the housing, any point on the external surface of the housing is approximately equally distant from the second central axis;
wherein the sight device satisfies at least one of following conditions:
6≤D5/93≤13,
8≤D6/92≤14,
4%≤|(D5−D6)/d1|≤6%,
4%≤|(D5−D6)/d2|≤6%,
0.8≤|(D1−D2)/(D3−D4)|≤3,
0.2≤|(A1−A2)/(A3−A4)|≤0.6,
3%≤g1/d1≤6%,
3%≤g1/d2≤6%,
2%≤g2/d1≤5%,
2%≤g2/d2≤5%,
2%≤g3/d1≤6%,
2%≤g3/d2≤5%,
where D5 is a distance from a second reference point to a first central axis, g3 is a minimum distance from the light receiving unit to a first held portion, D6 is a distance from a first reference point to the first central axis, g2 is a minimum distance from the light emitting unit to the first held portion, d1 is an inner diameter of the first held portion, d2 is an outer diameter of the first held portion, D1 is a distance between a first end surface and a third side surface, D2 is a distance between a second end surface and the third side surface, D3 is a distance between a first side surface and the third side surface, D4 is a distance between a second side surface and the third side surface, A1 is an angle at which a first line connecting the second reference point and a second intersection meets the first central axis, A2 is an angle at which a second line connecting the first reference point and the second intersection meets the first central axis, A3 is an angle at which a third line connecting the second reference point and a first intersection meets the first central axis, A4 is an angle at which a fourth line connecting the first reference point and the first intersection, g1 is a minimum distance between a first prism and the first held portion, d1 is the inner diameter of the first held portion, d2 is the outer diameter of the first held portion, g2 is a minimum distance between the light emitting unit and the first held portion, g3 is a minimum distance between the light receiving unit and the first held portion, wherein the second end surface comprises an outer edge and a middle point of the outer edge is the second reference point, wherein the housing further comprises the first held portion, wherein the erector unit comprises the first central axis, wherein the light emitting unit further comprises the first end surface disposed towards the objective lens unit, wherein the first held portion is hollow and cylindrical and comprises the inner diameter and the outer diameter, wherein the erector unit comprises the first prism and a second prism, wherein the light emitting unit further comprises the first end surface disposed towards the objective lens unit, wherein the light receiving unit further comprises the second end surface disposed towards the objective lens unit, wherein the second prism comprises the third side surface disposed towards the ocular lens unit, and a fourth side surface disposed towards the objective lens unit, wherein the first prism comprises the first side surface disposed towards the ocular lens unit, and the second side surface disposed towards the objective lens unit, wherein the first end surface comprises a plurality of points among which the first reference point is disposed farthest from the first central axis, wherein the second end surface comprises an outer edge and an inner edge disposed closer to the erector unit than the outer edge, wherein a middle point of the outer edge is the second reference point, and wherein the first central axis intersects the second side surface at the first intersection and intersects the third side surface at the second intersection.
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