US5420722A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-registering microlens for laser diodes
Assignee: Creo Inc
•
Filing: 1993-10-25
•
Granted: 1995-05-30
•
Expires: 2013-10-25
Abstract
Abstract A cylindrical microlens is mounted directly to a laser diode die by using reference edges touching the die at the emitting face and at the top face. Three edges are used to have a stable mounting. The cylindrical microlens, including the reference edges, is manufactured by drawing a glass preform, thus the edges are in perfect register with the optical center of the microlens.
Inventors
- 👤 Richard R. Bielak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:46
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/025; G02B3/00; G02B3/02; G02B3/06; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4204; H; H01; H01S; H01S5/00; H01S5/02; H01S5/022; H01S5/023; H01S5/02325; H01S5/02326; H01S5/005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
87 words
A microlens for use in conjunction with a light emitting laser diode die having two exposed surfaces, comprising: a first optical surface; a second optical surface; a plurality of reference edges projecting from said microlens, accurately located relative to said first and second optical surfaces, said microlens positionable with respect to said die such that said reference edges contact the two exposed surfaces of said die so as to locate said optical surfaces accurately relative to a point at which said light is emitted from said die.
Claim 2
Dependent Claim
87 words
A microlens for use in conjunction with a light emitting laser diode die having two exposed surfaces, comprising: a first optical surface; a second optical surface; a plurality of reference edges projecting from said microlens, accurately located relative to said first and second optical surfaces, said microlens positionable with respect to said die such that said reference edges contact the two exposed surfaces of said die so as to locate said optical surfaces accurately relative to a point at which said light is emitted from said die.
Claim 3
Dependent Claim
31 words
A microlens as claimed in claim 1 wherein the lens is an aspheric cylindrical lens manufactured by being drawn from a softened glass preform incorporating said optical surfaces and reference edges.
Claim 4
Dependent Claim
21 words
A microlens as claimed in claim 1 wherein the focal length of the lens is between 60 microns and 600 microns.
Claim 5
Dependent Claim
16 words
A micronlens as claimed in claim 1 wherein the number of reference edges equals to three.
References Cited (Backward Citations)
US5329406A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-05-29 | 1998-11-28 | 1999-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-05-29 | 2002-11-28 | 2003-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-05-29 | 2006-11-28 | 2007-05-30 | $7700.00 | Window Closed / Lapsed |