Device including an optical element with an integral surface diffuser

• US 6,259,562 B1
• Filed: 08/25/1998
• Issued: 07/10/2001
• Est. Priority Date: 08/25/1998
• Status: Expired due to Term

• Current Assignee: Luminit LLC
• Original Assignee: Physical Optics Corporation
• Inventors: Savant, Gajendra D., Laine, Jeffrey A., Shie, Rick L.
• Primary Examiner(s): Spyrou, Cassandra
• Assistant Examiner(s): BOUTSIKARIS, LEONIDAS
• Application Number:
  US09/139,444
• Time in Patent Office: 1,050 Days
• Field of Search: 359/16, 359/19, 359/599, 359/15, 359/175, 359/201
• US Class Current: 359/599
• CPC Class Codes: G02B 5/021 the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
• CPC Class Codes: G02B 5/0278 used in transmission
• CPC Class Codes: G02B 5/0284 used in reflection

Abstract

A device has a carrier and an optical element supported by the carrier. The optical element has a macro-optical characteristic and at least one surface. A light shaping surface microstructure is integral on the surface of the optical element. The microstructure homogenizes, shapes and controls directionality of light emanating from the surface of the optical element to produce a smooth, consistent and continuous pattern of light in a predetermined distribution shape and direction. The optical element can either transmit or reflect light incident on a portion of the device and the optical element.

Claims

1. A device comprising:

a hollow carrier having an open end portion;

an optical element captively retained by the open end portion of the carrier, wherein the optical element includes a macro-optical characteristic and defines at least one surface;

wherein the optical element further includes a light shaping surface microstructure that is random in nature and integral with said surface of the optical element;

a light source, spaced from the microstructure, for producing output light;

a light-reflective target interposed between the light source and the carrier, wherein the target includes a light-reflective surface that is so disposed relative to the light source and the microstructure as to reflect output light from the light source toward the microstructure;

wherein the random nature of the microstructure enables the optical element to homogenize incident light transmitted through the optical element and into the carrier, and wherein the random nature of the microstructure additionally enables the optical element to shape and control directionality of said incident light transmitted through the optical element, thereby to produce in the carrier a smooth, continuous pattern of light in a predetermined distribution shape and direction.

2. The device of claim 1, further comprising:

a sensor disposed within the hollow carrier for transmitting, for a preselected purpose, the incident light transmitted through the optical element.

6. The device of claim 1, wherein the incident light is ambient light.

7. The device of claim 2, wherein the sensor is adapted to receive, read, store, or transmit the light.

3. A device comprising:

a hollow carrier having an open end portion;

a light-reflective optical element captively retained by the open end portion of the carrier, wherein the optical element includes an integral light-reflective macro-optical characteristic which defines an exterior surface of the optical element;

wherein the light-reflective optical element further includes a light-shaping surface microstructure that is random in nature and integral with said exterior surface of the light-reflective optical element, wherein the random nature of the microstructure enables the light-reflective optical element not only to homogenize incident light which is reflected from the exterior surface of the light-reflective optical element external to the carrier but also to shape and control directionality of said light, thereby to produce external to the carrier a smooth, continuous pattern of light in a predetermined distribution shape and direction.

4. The device of claim 3, further comprising:

a light source, spaced from the microstructure, for producing output light;

a second light-reflective optical element having a light-reflective exterior surface, wherein the second optical element is so disposed relative to the light source and the carrier as to reflect said incident light from the light source toward the microstructure.

5. The device of claim 4, wherein the second light-reflective optical element separately includes said random light-shaping surface microstructure, and wherein said separately-included microstructure is integrally formed on the light-reflective exterior surface of said second optical element.

8. The device of claim 3, wherein the incident light is ambient light.