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US 11,237,459 B2Granted
Camera comprising a light-refracting apparatus for dispersing light
AssigneeAvigilon Corporation
InventorAmar Nanda
Life of this patent
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Abstract
A camera includes a housing, a light source positioned within the housing, and a light-refracting apparatus. The light-refracting apparatus comprises a collimator shaped to collimate light emitted by the light source, and a lens comprising an at least partially concave light-emitting surface positioned to receive light collimated by the collimator and shaped to disperse the collimated light. The light-refracting apparatus is arranged to cause the dispersed light to be transmitted from within the housing into a field of view region of the camera.
Claims27
A camera comprising:
- a housing;
- a light source positioned within the housing;
- and
- a light-refracting apparatus comprising:
- a recess at least partially enclosing the light source;
- a collimator shaped to collimate light emitted by the light source;
- and
- a lens comprising a light-emitting surface positioned to receive light collimated by the collimator and shaped to disperse the collimated light, the light-emitting surface having a single central concave portion and two convex portions extending from opposite sides of the single central concave portion to respective edges of the light-emitting surface,
- wherein the light-refracting apparatus is arranged to cause the dispersed light to be transmitted from within the housing into a field of view region of the camera,
- wherein the recess, the collimator and the lens are rectangular, a long axis of the recess extending about perpendicularly between the opposite sides of the single central concave portion and along the two convex portions such that a light beam emitted by the light source is shaped by the recess, the collimator and the lens to illuminate the field of view region, wherein the field of view region has at least a 110° horizontal extent and at least a 55° vertical extent.
7 more elements
A light-refracting apparatus for a camera, comprising:
- a recess for at least partially enclosing a light source;
- a collimator shaped to collimate light having entered the collimator from the recess;
- and
- a lens comprising a light-emitting surface positioned to receive light collimated by the collimator and shaped to disperse the collimated light, the light-emitting surface comprising a single central concave portion and two convex portions extending from opposite sides of the single central concave portion to respective edges of the light-emitting surface,
- wherein the recess, the collimator and the lens are rectangular, a long axis of the recess extending about perpendicularly between the opposite sides of the single central concave portion and along two convex portions such that a light beam emitted by the light source is shaped by the recess, the collimator and the lens to illuminate a field of view region having at least a 110° horizontal extent and at least a 55° vertical extent.
2 more elements
A lens comprising:
- a recess for at least partially enclosing a light source;
- a rear surface;
- and
- a front surface, the front surface having a single central concave portion and two convex portions extending from opposite sides of the single central concave portion to respective edges of the front surface,
- wherein the lens is shaped to collimate, by total internal reflection, light having entered the lens through the rear surface, and to disperse the collimated light through the front surface,
- wherein the recess and the lens are rectangular, a long axis of the recess extending about perpendicularly between opposite sides of the single central concave portion and along the two convex portions such that the light having entered the lens is shaped by the lens to illuminate a field of view region having at least a 110° horizontal extent and at least a 55° vertical extent.
3 more elements
Dependencies are inferred from the claim text.