US Patent No: 6,487,014
Number of patents in Portfolio can not be more than 2000
High isolation optical switch, isolator or circulator having thin film polarizing beam-splitters
Stats
-
Nov 26, 2002
Issued date -
Jan 25, 1999
filing date -
09/236,102
serial no -
Expired
status
Importance
Loading Importance Indicators...
Abstract
An optical device for controlling the flow of light between ports includes a pair of polarizing devices, which employ frustrated total internal reflection and interference in a thin film coating to reflect p-polarized light and to transmit s-polarized light. Polarization-rotating devices are used to rotate the polarization plane of the s- and p-polarized light beams so as to create optical switches, isolators and circulators using these polarizing devices.
Loading the Abstract Image...
First Claim
Related Publications
Loading Related Publications...
International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
|
|
|||
| 5,912,762 Thin film polarizing device | 49 | 1996 | |
| 5,982,541 High efficiency projection displays having thin film polarizing beam-splitters | 49 | 1998 | |
| 6,285,423 Polarizing back-lighting system for direct view liquid crystal displays | 9 | 1999 | |
| 6,317,264 Thin film polarizing device having metal-dielectric films | 4 | 1999 | |
|
|
|||
| 4,966,438 Dielectric layer polarizer | 49 | 1989 | |
|
|
|||
| 5,648,870 Dichroic mirror and projector having the same | 23 | 1994 | |
|
|
|||
| 5,466,564 Control of non-contact interference fringes in photographic films | 6 | 1994 | |
|
|
|||
| 4,650,289 Optical circulator | 76 | 1980 | |
|
|
|||
| 4,221,464 Hybrid Brewster's angle wire grid infrared polarizer | 45 | 1978 | |
|
|
|||
| 4,733,926 Infrared polarizing beamsplitter | 28 | 1986 | |
|
|
|||
| 4,272,159 Optical circulator | 24 | 1979 | |
|
|
|||
| 4,627,688 Beam splitter | 26 | 1985 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 26, 2014 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 11.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
| Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |