FI63118C - Laogblaendande samlingslins foer en oh-projektor - Google Patents
Laogblaendande samlingslins foer en oh-projektor Download PDFInfo
- Publication number
- FI63118C FI63118C FI752349A FI752349A FI63118C FI 63118 C FI63118 C FI 63118C FI 752349 A FI752349 A FI 752349A FI 752349 A FI752349 A FI 752349A FI 63118 C FI63118 C FI 63118C
- Authority
- FI
- Finland
- Prior art keywords
- lens
- lenses
- stepped
- staggered
- cylindrical
- Prior art date
Links
- 239000011521 glass Substances 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 8
- 230000004313 glare Effects 0.000 description 14
- 229920003023 plastic Polymers 0.000 description 14
- 239000004033 plastic Substances 0.000 description 14
- 230000003287 optical effect Effects 0.000 description 10
- 238000000465 moulding Methods 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 4
- 239000004926 polymethyl methacrylate Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920006217 cellulose acetate butyrate Polymers 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 229920000515 polycarbonate Polymers 0.000 description 3
- RKDVKSZUMVYZHH-UHFFFAOYSA-N 1,4-dioxane-2,5-dione Chemical compound O=C1COC(=O)CO1 RKDVKSZUMVYZHH-UHFFFAOYSA-N 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- 239000003570 air Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- VXHYVVAUHMGCEX-UHFFFAOYSA-N 2-(2-hydroxyphenoxy)phenol Chemical compound OC1=CC=CC=C1OC1=CC=CC=C1O VXHYVVAUHMGCEX-UHFFFAOYSA-N 0.000 description 1
- KUBDPQJOLOUJRM-UHFFFAOYSA-N 2-(chloromethyl)oxirane;4-[2-(4-hydroxyphenyl)propan-2-yl]phenol Chemical compound ClCC1CO1.C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 KUBDPQJOLOUJRM-UHFFFAOYSA-N 0.000 description 1
- OXQGTIUCKGYOAA-UHFFFAOYSA-N 2-Ethylbutanoic acid Chemical compound CCC(CC)C(O)=O OXQGTIUCKGYOAA-UHFFFAOYSA-N 0.000 description 1
- ZAWQXWZJKKICSZ-UHFFFAOYSA-N 3,3-dimethyl-2-methylidenebutanamide Chemical compound CC(C)(C)C(=C)C(N)=O ZAWQXWZJKKICSZ-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PYGXAGIECVVIOZ-UHFFFAOYSA-N Dibutyl decanedioate Chemical compound CCCCOC(=O)CCCCCCCCC(=O)OCCCC PYGXAGIECVVIOZ-UHFFFAOYSA-N 0.000 description 1
- 101100128278 Mus musculus Lins1 gene Proteins 0.000 description 1
- WHNWPMSKXPGLAX-UHFFFAOYSA-N N-Vinyl-2-pyrrolidone Chemical compound C=CN1CCCC1=O WHNWPMSKXPGLAX-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- OBNCKNCVKJNDBV-UHFFFAOYSA-N ethyl butyrate Chemical compound CCCC(=O)OCC OBNCKNCVKJNDBV-UHFFFAOYSA-N 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000005329 float glass Substances 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 210000003128 head Anatomy 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000005336 safety glass Substances 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
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 (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US49913874A | 1974-08-21 | 1974-08-21 | |
US49913874 | 1974-08-21 | ||
US55441775 | 1975-03-03 | ||
US05/554,417 US3982822A (en) | 1975-03-03 | 1975-03-03 | Composite Fresnel lens assembly |
Publications (3)
Publication Number | Publication Date |
---|---|
FI752349A FI752349A (de) | 1976-02-22 |
FI63118B FI63118B (fi) | 1982-12-31 |
FI63118C true FI63118C (fi) | 1983-04-11 |
Family
ID=27053045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI752349A FI63118C (fi) | 1974-08-21 | 1975-08-20 | Laogblaendande samlingslins foer en oh-projektor |
Country Status (9)
Country | Link |
---|---|
JP (1) | JPS5343825B2 (de) |
AU (1) | AU475642B2 (de) |
BR (1) | BR7505320A (de) |
DE (1) | DE2537547C3 (de) |
FI (1) | FI63118C (de) |
FR (1) | FR2282656A1 (de) |
GB (1) | GB1520471A (de) |
IT (1) | IT1041287B (de) |
SE (1) | SE418423B (de) |
Families Citing this family (4)
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 |
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 JP JP10109575A patent/JPS5343825B2/ja not_active Expired
- 1975-08-20 BR BR7505320*A patent/BR7505320A/pt unknown
- 1975-08-20 FR FR7525722A patent/FR2282656A1/fr active Granted
- 1975-08-20 GB GB34651/75A patent/GB1520471A/en not_active Expired
- 1975-08-20 DE DE2537547A patent/DE2537547C3/de not_active Expired
- 1975-08-20 IT IT51014/75A patent/IT1041287B/it active
- 1975-08-20 FI FI752349A patent/FI63118C/fi not_active IP Right Cessation
- 1975-08-20 AU AU84117/75A patent/AU475642B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BR7505320A (pt) | 1976-08-03 |
JPS5343825B2 (de) | 1978-11-22 |
AU475642B2 (en) | 1976-08-26 |
SE7508976L (sv) | 1976-02-23 |
JPS5152827A (de) | 1976-05-10 |
GB1520471A (en) | 1978-08-09 |
FI63118B (fi) | 1982-12-31 |
DE2537547A1 (de) | 1976-03-11 |
AU8411775A (en) | 1976-08-26 |
FR2282656B1 (de) | 1978-04-07 |
DE2537547C3 (de) | 1981-05-27 |
FR2282656A1 (fr) | 1976-03-19 |
FI752349A (de) | 1976-02-22 |
SE418423B (sv) | 1981-05-25 |
IT1041287B (it) | 1980-01-10 |
DE2537547B2 (de) | 1980-10-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM | Patent lapsed |
Owner name: MINNESOTA MINING AND MANUFACTURING COMPANY |