Collimating compound catoptric immersion lens

• US 4,770,514 A
• Filed: 11/21/1986
• Issued: 09/13/1988
• Est. Priority Date: 11/21/1986
• Status: Expired due to Fees

• Current Assignee: Quaestus Corporation
• Original Assignee: Quality Technologies Corporation
• Inventors: Silverglate, David
• Primary Examiner(s): Corbin, John K.
• Assistant Examiner(s): Gass, Rebecca D.
• Application Number:
  US06/933,377
• Time in Patent Office: 662 Days
• Field of Search: 350/443, 350/432
• US Class Current: 359/728
• CPC Class Codes: G02B 19/0028 refractive and reflective surfaces, e.g. non-imaging catadioptric systems
• CPC Class Codes: G02B 19/0061 the light source comprising a LED semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission H01L33/00
• CPC Class Codes: G02B 19/0076 for use with a detector G02B19/009, G02B19/0095 take precedence

Abstract

The lens includes a transparent body having a central section and a peripheral section. The central section has a surface with a truncated elliptical curvature. The peripheral section has an inner refracting surface and an outer reflecting surface. The inner refracting surface has a diverging truncated conical shape. The outer reflecting surface has a parabolic shape.

Claims

1. Apparatus for detecting light emitted from a source comprising first and second collimating compound lens means, each having a body with a central seciton and a peripheral section, said central section having a surface with the shape of a substantially truncated ellipsoid and said peripheral section having an inner refracting truncated conical surface and an outer reflecting substantially parabolic surface, light source means immersed in said first lens means body on the optical axis and light detector means immersed in said second lens means body on the optical axis.

2. The lens of claim 1, wherein said parabolic shape is a tilted parabolic shape.

3. The apparatus of claim 1, further comprising a reflective surface between said first and said second means.

4. Apparatus for generating and collimating light comprising a light source and collimating compound lens means having a transparent solid body with an optical axis, said body having a central section and a peripheral section, said central section having a surface with substantially the shape of a truncated ellipsoid and said peripheral section having an inner refracting surface and an outer reflecting surface, said inner refracting surface having a substantially diverging truncated conical shape and said outer reflecting surface having a substantially parabolic shape, said light source being wholly immersed in said body, along the optical axis.

5. The apparatus of claim 4 wherein said light source is a light emitting diode.

6. The apparatus of claim 4, wherein said parabolic shape is a tilted parabolic shape.

7. The apparatus of claim 4, wherein said ellipsoid has a focus substantially at said source.