GB1447509A - Striped dichroic filters with butted stripes - Google Patents
Striped dichroic filters with butted stripesInfo
- Publication number
- GB1447509A GB1447509A GB5066473A GB5066473A GB1447509A GB 1447509 A GB1447509 A GB 1447509A GB 5066473 A GB5066473 A GB 5066473A GB 5066473 A GB5066473 A GB 5066473A GB 1447509 A GB1447509 A GB 1447509A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resist
- photo
- stripes
- filter elements
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/201—Filters in the form of arrays
Abstract
1447509 Striped dichroic filters OPTICAL COATING LABORATORY Inc 31 Oct 1973 [13 Nov 1972] 50664/73 Headings G2J and G2X A striped dichroic filter, Fig. 10, having three sets of parallel filter elements, each element abutting stripes of the two other sets, is formed by coating a substrate with a photo-resist, masking the substrate so as to expose only stripes of the photo-resist which correspond to areas which will define the second and third sets of filter elements, developing the exposed portions of the photoresist and removing the unexposed portions, depositing a multiple layer, red pass filter 31 over the substrate and the remaining photo-resist, covering the filter layer 31 with a metal layer 32 and immersing the filter in a solvent to remove the photo-resist and portions of the layers 31, 32 which are superimposed thereon; this process is repeated twice to produce sets of blue and green pass filter elements, the edges of the exposed photo-resist stripes being arranged to overlap particles the adjacent filter elements already formed see Fig. 5, and the metal layer being omitted from the third process; finally, overlapping portions of the filter elements are removed by attacking the intervening metal layers 32, 38 with ferric chloride.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US30569272A | 1972-11-13 | 1972-11-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1447509A true GB1447509A (en) | 1976-08-25 |
Family
ID=23181909
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4765075A Expired GB1447510A (en) | 1972-11-13 | 1973-10-31 | Methods of forming patterns of parallel stripes on substrates |
| GB5066473A Expired GB1447509A (en) | 1972-11-13 | 1973-10-31 | Striped dichroic filters with butted stripes |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4765075A Expired GB1447510A (en) | 1972-11-13 | 1973-10-31 | Methods of forming patterns of parallel stripes on substrates |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPS515303B2 (en) |
| CA (1) | CA1004073A (en) |
| FR (1) | FR2206516B1 (en) |
| GB (2) | GB1447510A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6645612B2 (en) | 2001-08-07 | 2003-11-11 | Saint-Gobain Ceramics & Plastics, Inc. | High solids hBN slurry, hBN paste, spherical hBN powder, and methods of making and using them |
-
1973
- 1973-10-29 CA CA184,489A patent/CA1004073A/en not_active Expired
- 1973-10-31 GB GB4765075A patent/GB1447510A/en not_active Expired
- 1973-10-31 GB GB5066473A patent/GB1447509A/en not_active Expired
- 1973-11-12 FR FR7340171A patent/FR2206516B1/fr not_active Expired
- 1973-11-12 JP JP48127135A patent/JPS515303B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2355851B2 (en) | 1976-09-23 |
| DE2355851A1 (en) | 1974-05-30 |
| GB1447510A (en) | 1976-08-25 |
| CA1004073A (en) | 1977-01-25 |
| FR2206516B1 (en) | 1977-09-16 |
| JPS50853A (en) | 1975-01-07 |
| JPS515303B2 (en) | 1976-02-19 |
| FR2206516A1 (en) | 1974-06-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |