NL6913622A - - Google Patents
Info
- Publication number
- NL6913622A NL6913622A NL6913622A NL6913622A NL6913622A NL 6913622 A NL6913622 A NL 6913622A NL 6913622 A NL6913622 A NL 6913622A NL 6913622 A NL6913622 A NL 6913622A NL 6913622 A NL6913622 A NL 6913622A
- Authority
- NL
- Netherlands
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/40—Optical focusing aids
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/53—Means for automatic focusing, e.g. to compensate thermal effects
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Projection Apparatus (AREA)
- Microscoopes, Condenser (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR167791 | 1968-09-27 | ||
| FR6903970A FR2034178A6 (xx) | 1969-02-13 | 1969-02-13 | |
| FR6911009A FR2042288A6 (xx) | 1969-04-10 | 1969-04-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL6913622A true NL6913622A (xx) | 1970-04-01 |
Family
ID=27244891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL6913622A NL6913622A (xx) | 1968-09-27 | 1969-09-08 |
Country Status (6)
| Country | Link |
|---|---|
| BE (1) | BE736454A (xx) |
| CA (1) | CA929641A (xx) |
| CH (1) | CH506801A (xx) |
| DE (1) | DE1947337C3 (xx) |
| ES (1) | ES370160A1 (xx) |
| NL (1) | NL6913622A (xx) |
-
1969
- 1969-07-23 BE BE736454D patent/BE736454A/xx unknown
- 1969-08-01 ES ES370160A patent/ES370160A1/es not_active Expired
- 1969-08-13 CH CH1250969A patent/CH506801A/fr not_active IP Right Cessation
- 1969-08-13 CA CA059461A patent/CA929641A/en not_active Expired
- 1969-09-08 NL NL6913622A patent/NL6913622A/xx unknown
- 1969-09-18 DE DE19691947337 patent/DE1947337C3/de not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE736454A (xx) | 1969-12-31 |
| CA929641A (en) | 1973-07-03 |
| DE1947337B2 (de) | 1973-08-16 |
| CH506801A (fr) | 1971-04-30 |
| DE1947337A1 (de) | 1970-04-16 |
| ES370160A1 (es) | 1971-04-01 |
| DE1947337C3 (de) | 1974-03-14 |