Focusing lens system
First Claim
Patent Images
1. A lens system for focusing a light beam, the system comprising:
- a housing structure including a first portion, a second portion, and an adjustment mechanism for moving the first portion relative to the second portion;
an LED coupled to the first portion of the housing; and
a lens coupled to the second portion of the housing, the lens including a lens body defining a front face, a rear-facing void for receiving the LED, and a side surface extending between the front face and the rear void, wherein the front face includes a central surface surrounded by an annular surface that defines in cross-section a concave curve, the rear void dimensioned to receive the LED, the void defined by a side wall and a base, wherein the sidewall and the base define in cross-section concave curves;
wherein the adjustment mechanism and lens provide for adjustment of the light beam between a spot beam and a wide beam.
5 Assignments
0 Petitions
Accused Products
Abstract
A lens for a flashlight or other lighting unit provides for focusing light from a source, such as an LED, to provide a light beam adjustable between a spot beam and a wide beam. The lens includes a lens body with a front face, a rear LED-receiving well, and a side surface extending between the front face and the rear well. The front face includes a central surface surrounded by an annular concave surface. The rear well includes a space for the LED to be adjusted in position. The rear well space is defined by a concavely-curved sidewall and a concavely-curved base. The concave curvature of the sidewall and base may be Bezier curves.
88 Citations
38 Claims
-
1. A lens system for focusing a light beam, the system comprising:
-
a housing structure including a first portion, a second portion, and an adjustment mechanism for moving the first portion relative to the second portion; an LED coupled to the first portion of the housing; and a lens coupled to the second portion of the housing, the lens including a lens body defining a front face, a rear-facing void for receiving the LED, and a side surface extending between the front face and the rear void, wherein the front face includes a central surface surrounded by an annular surface that defines in cross-section a concave curve, the rear void dimensioned to receive the LED, the void defined by a side wall and a base, wherein the sidewall and the base define in cross-section concave curves; wherein the adjustment mechanism and lens provide for adjustment of the light beam between a spot beam and a wide beam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 25, 26)
-
-
20. A lens for focusing light from an LED to provide a light beam, the lens comprising:
-
a lens body defining a front face, a rear LED-receiving well, and a side surface interconnecting the front face and the rear well, wherein the front face includes a central surface surrounded by an annular surface that defines in cross-section a concave curve, further wherein the rear well defines a space within which the LED may be adjusted in position, the well defined by a sidewall and a base, wherein the sidewall and the base define in cross-section concave curves. - View Dependent Claims (21, 22, 23, 24, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
-
-
37. A flashlight with a lens system for focusing a light beam, the flashlight comprising:
-
a housing structure including a first portion, a second portion, and an adjustment mechanism for moving the first portion relative to the second portion, wherein a relative movement of the portions of the housing is between about 5-mm and about 6-mm; an LED coupled to the first portion of the housing; and a lens coupled to the second portion of the housing, the lens including a lens body defining a front face, a rear-facing void for receiving the LED, and a side surface extending between the front face and the rear void, wherein the front face includes a central surface surrounded by an annular surface that defines in cross-section a concave curve, the rear void dimensioned to receive the LED, the void defined by a side wall and a base, wherein the sidewall and the base define in cross-section concave curves, and wherein the adjustment mechanism and lens provide for adjustment of the light beam between a wide beam of at least about +/−
20°
of angular distribution at about 50% of a maximum intensity and a spot beam of no more than about +/−
5°
of angular distribution at about 50% of the maximum intensity. - View Dependent Claims (38)
-
Specification