US Patent No: 7,851,735
Number of patents in Portfolio can not be more than 2000
Microscope automatic focusing device and method thereof
Stats
-
Dec 14, 2010
Issued date -
Sep 28, 2007
filing date -
11/863,783
serial no -
In Force
status
Importance
Loading Importance Indicators...
Abstract
An auto focus device and method are provided. The device comprises a beam splitter set; a laser emitting device disposed at a first side of the beam splitter set for providing a laser beam to the beam splitter; a lens set disposed at a second side of the beam splitter set and opposing to the testing subject positioned at a third side of the beam splitter set for refracting a reflected beam from a testing subject for generating a light spot; and a photo detecting device disposed with respect to the lens set for receiving the light spot and generating a driving signal.
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 |
|---|---|---|---|
|
|
|||
| 6,229,771 Method and apparatus for generating focus error signals in a multi-beam optical disk drive | 9 | 1998 | |
|
|
|||
| 7,345,814 Microscope system and microscope focus maintaining device for the same | 7 | 2004 | |
|
|
|||
| 5,247,165 Displacement detecting apparatus using graduated linear scale | 18 | 1992 | |
|
|
|||
| 4,503,324 Automatic focusing device | 15 | 1982 | |
|
|
|||
| 4,931,630 Apparatus and method for automatically focusing an interference microscope | 16 | 1989 | |
Patent Citation Ranking
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | Jun 14, 2014 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | Jun 14, 2018 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Jun 14, 2022 |
| Fee | Large entity fee | small entity fee | micro entity fee |
|---|---|---|---|
| Surcharge - 3.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| Surcharge - 7.5 year - Late payment within 6 months | $160.00 | $80.00 | $40.00 |
| 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 |