JPS5343825B2 - - Google Patents
Info
- Publication number
- JPS5343825B2 JPS5343825B2 JP10109575A JP10109575A JPS5343825B2 JP S5343825 B2 JPS5343825 B2 JP S5343825B2 JP 10109575 A JP10109575 A JP 10109575A JP 10109575 A JP10109575 A JP 10109575A JP S5343825 B2 JPS5343825 B2 JP S5343825B2
- Authority
- JP
- Japan
- 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
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
- G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
- G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
-
- 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
- G03B21/132—Overhead projectors, i.e. capable of projecting hand-writing or drawing during action
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/418—Refractive
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2551/00—Optical elements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Projection Apparatus (AREA)
- Lenses (AREA)
- Liquid Crystal (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US49913874A | 1974-08-21 | 1974-08-21 | |
| US05/554,417 US3982822A (en) | 1975-03-03 | 1975-03-03 | Composite Fresnel lens assembly |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5152827A JPS5152827A (cg-RX-API-DMAC10.html) | 1976-05-10 |
| JPS5343825B2 true JPS5343825B2 (cg-RX-API-DMAC10.html) | 1978-11-22 |
Family
ID=27053045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10109575A Expired JPS5343825B2 (cg-RX-API-DMAC10.html) | 1974-08-21 | 1975-08-20 |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS5343825B2 (cg-RX-API-DMAC10.html) |
| AU (1) | AU475642B2 (cg-RX-API-DMAC10.html) |
| BR (1) | BR7505320A (cg-RX-API-DMAC10.html) |
| DE (1) | DE2537547C3 (cg-RX-API-DMAC10.html) |
| FI (1) | FI63118C (cg-RX-API-DMAC10.html) |
| FR (1) | FR2282656A1 (cg-RX-API-DMAC10.html) |
| GB (1) | GB1520471A (cg-RX-API-DMAC10.html) |
| IT (1) | IT1041287B (cg-RX-API-DMAC10.html) |
| SE (1) | SE418423B (cg-RX-API-DMAC10.html) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2472197A1 (fr) * | 1979-12-18 | 1981-06-26 | Cintra Daniel | Lentille de fresnel et son application a la television |
| USD315424S (en) | 1989-02-27 | 1991-03-12 | Fresnel Technologies, Inc. | Vertical barrier fresnel lens array for infrared motion detector systems |
| DE4207940C2 (de) * | 1992-03-12 | 1995-08-17 | Gerd Kueppersbusch | Etikettiereinrichtung |
| US5296882A (en) * | 1992-12-21 | 1994-03-22 | Minnesota Mining And Manufacturing Company | Overhead projector with catadioptric fresnel lens |
| JP2957910B2 (ja) * | 1994-07-08 | 1999-10-06 | 大日本スクリーン製造株式会社 | 照明装置 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3511563A (en) * | 1967-11-14 | 1970-05-12 | Minnesota Mining & Mfg | Projector |
| DE2317830C3 (de) * | 1973-04-09 | 1980-06-19 | Ernst Leitz Wetzlar Gmbh, 6300 Lahn- Wetzlar | Durchlicht-Schreibprojektor |
-
1975
- 1975-08-11 SE SE7508976A patent/SE418423B/xx not_active IP Right Cessation
- 1975-08-20 FI FI752349A patent/FI63118C/fi not_active IP Right Cessation
- 1975-08-20 JP JP10109575A patent/JPS5343825B2/ja not_active Expired
- 1975-08-20 AU AU84117/75A patent/AU475642B2/en not_active Expired
- 1975-08-20 BR BR7505320*A patent/BR7505320A/pt unknown
- 1975-08-20 DE DE2537547A patent/DE2537547C3/de not_active Expired
- 1975-08-20 IT IT51014/75A patent/IT1041287B/it active
- 1975-08-20 FR FR7525722A patent/FR2282656A1/fr active Granted
- 1975-08-20 GB GB34651/75A patent/GB1520471A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE2537547B2 (de) | 1980-10-02 |
| AU475642B2 (en) | 1976-08-26 |
| SE7508976L (sv) | 1976-02-23 |
| FI752349A7 (cg-RX-API-DMAC10.html) | 1976-02-22 |
| FR2282656A1 (fr) | 1976-03-19 |
| FI63118C (fi) | 1983-04-11 |
| AU8411775A (en) | 1976-08-26 |
| FI63118B (fi) | 1982-12-31 |
| GB1520471A (en) | 1978-08-09 |
| FR2282656B1 (cg-RX-API-DMAC10.html) | 1978-04-07 |
| DE2537547A1 (de) | 1976-03-11 |
| SE418423B (sv) | 1981-05-25 |
| JPS5152827A (cg-RX-API-DMAC10.html) | 1976-05-10 |
| DE2537547C3 (de) | 1981-05-27 |
| IT1041287B (it) | 1980-01-10 |
| BR7505320A (pt) | 1976-08-03 |