GB2077939A - A plate-shaped lens having a light shielding opaque ink layer - Google Patents
A plate-shaped lens having a light shielding opaque ink layer Download PDFInfo
- Publication number
- GB2077939A GB2077939A GB8115326A GB8115326A GB2077939A GB 2077939 A GB2077939 A GB 2077939A GB 8115326 A GB8115326 A GB 8115326A GB 8115326 A GB8115326 A GB 8115326A GB 2077939 A GB2077939 A GB 2077939A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- shaped lens
- light shielding
- lens
- shielding layer
- 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.)
- Granted
Links
Classifications
-
- 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
- G03B27/00—Photographic printing apparatus
- G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
- G03B27/52—Details
- G03B27/522—Projection optics
- G03B27/525—Projection optics for slit exposure
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0012—Arrays characterised by the manufacturing method
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/0062—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between
- G02B3/0068—Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between arranged in a single integral body or plate, e.g. laminates or hybrid structures with other optical elements
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Eyeglasses (AREA)
- Overhead Projectors And Projection Screens (AREA)
- Printing Methods (AREA)
Abstract
A light shielding opaque ink layer (23) is formed on a plate-shaped lens comprising a base plate (22) carrying an array of lens elements (21) lying in the same plane. The light shielding layer (23) renders the surface of the base plate (22) around the elements (21) opaque. The method of forming the light shielding layer (23) involves printing or transferring an ink mask to the plate-shaped lens when molding the plate-shaped lens or immediately after the plate-shaped lens is molded. <IMAGE>
Description
SPECIFICATION
A plate-shaped lens and the method of making the lens
Background of the Invention
The present invention relates to a light shielding layer for a plate-shaped lens which is
employed in a slit-exposure apparatus of a copying machine or in other optical apparatus, to a
method of manufacturing the light shielding layer,
and to the construction of the plate-shaped lens
having such light shielding layer.
The plate-shaped lens comprises a plurality of
small lens arranged in the same plane with a
certain space therebetween and is formed in the shape of a plate as a whole. In particular, a long, narrow plate-shaped lens which is employed in the exposure apparatus of a copying machine is called a Lens Strip. As mentioned above, since the plate-shaped lens contains a plurality of lens
members arranged in the same plane, when it is employed in the optical apparatus, it is necessary to shield light from the areas between the lens
members in the plate-shaped lens so as to prevent
light from entering the optical apparatus from those areas between the lens members. In order to attain this, a light shielding plate is disposed in the areas between the lens members.
Conventionally, such light shielding plate is formed independently from the plate-shaped lens
and an opening for each lens member is formed in the light shielding plate. The light shielding plate with such openings is placed over the plateshaped lens so as to bring each opening into
complete agreement with each lens member, and
is then caused to adhere to the plate-shaped lens.
Generally, it is extremely difficult to superimpose the light shielding plate and the plate-shaped lens
in complete agreement with respect to position.
Therefore, a special apparatus is required for such
registration, which stiil requires time and labor in
assembling the light shielding plate and the piate
shaped lens in the desired manner and adjusting
their registration. Even if such registration has
been successfully done, there is still the risk of the
light shielding plate being shifted crosswise or
upward from the plate-shaped lens due to
changes in ambient temperature and humidity,
allowing light to enter the optical apparatus other than through the lens members in the plate
shaped lens, or hindering light from passing
through the lens members, with the result that the
light shielding plate does not play its desired role
any longer.
Summary of the Invention
The invention provides a light shielding layer
made of an opaque ink layer for use with a plate
shaped lens. This ink layer is formed in the areas
other than the lens members in the plate-shaped
lens when molding the plate-shaped lens or
immediately after the plate-shaped lens is
molded, by printing the layer on the plate-shaped
lens or transferring the same to the plate-shaped
lens.
According to the invention, no special registration apparatus for forming the ink layer exactly in the areas between the lens members is required, and, moreover, the ink layer can be formed in a simple manner and inexpensively.
Furthermore, the layer does not peel off the plateshaped lens, whereby stable plate-shaped lenses can be provided.
It is an object of the invention to provide an improved light shielding layer of a plate-shaped lens.
Another object of the invention is to provide a method of producing the above-described improved light shielding layer of a plate-shaped lens.
A further object of the invention is to provide the construction of a plate-shaped lens having the above-described light shielding layer.
These and other objects of the invention will become apparent from the following explanation of the invention in conjunction of the drawings attached.
Brief Description of the Drawings
Fig. 1 (a) is a perspective view of a conventional plate-shaped lens.
Fig. 1 (b) is a sectional view taken on line b-b in Fig. 1(a).
Fig. 2 is a partial sectional view of a plateshaped lens according to the invention.
Detailed Description of the Preferred Embodiment
Referring to Figs. 1 (a) and 1(b), there are shown a conventional plate-shaped lens comprising a base plate 3 made of transparent plastic, in which a plurality of lens members 1 are formed integrally with the base plate, and a light shielding plate 2 which makes each lens member 1 independent and obstructs light passing through the areas other than the lens members 1 in the plate-shaped lens. As shown in Fig. 1 (a) and 1(b), the light shielding plate 2 and the base plate 3 are made separately and the former is caused to adhere to the latter.
Referring to Fig. 2, there is shown the construction of a plate-shaped lens according to the invention. In Fig. 2, reference numeral 21 indicates lens members of the plate-shaped lens, which lens members are formed integrally with a base plate 22 made of transparent plastic.
Reference numeral 23 indicates a light shielding layer which makes each lens member 21 independent and obstructs light passing through the areas other than the lens members 21 in the plate-shaped lens. The light shielding layer 23 can be formed on both sides of the base plate 22 as shown in Fig. 2 or on one side thereof.
The light shielding layer 23 according to the invention can be formed by the following methods:
In the first method, multiple lens members 21 are formed integrally with the base plate 22 which is made of transparent synthetic resin. The light shielding plate 23 is then formed by offset printing, using an opaque ink, on one side of the base plate 22.
In the second method, the areas other than the areas for forming the lens members in a mold for molding the base plate 22 with the multiple lens members 21, that is, the areas corresponding to the areas for printing the light shielding layer 23, are made of a porous metal, for instance, made of a sintered metal or a sponge-like metal.
Immediately before the molding, an opaque ink is applied to the porous metal portions. That applied ink is transferred to the base plate 22 during the molding process, whereby the light shielding layer 23 is formed.
In the third method, when the plate-shaped lens is formed by thermal pressing of a pre-formed transparent plate, the above-mentioned first or second method is applied.
In the case where the first method is employed, the plate-shaped lens without the light shielding layer is formed from the plate-shaped transparent plate by thermal pressing and the light shielding layer is formed by offset printing on the formed plate-shaped lens. In the case where the second method is employed, the areas other than the areas for forming the lens members in the thermal pressing mold are made of a porous metal layer.
Immediately before the thermal pressing, the opaque ink is applied to the porous metal layer and that ink is transferred to the plate-shaped lens during the thermal pressing, whereby the light shielding layer is formed.
According to the invention, the light shielding layer is formed simultaneously with the molding of the plate-shaped lens or immediately after the molding of the same, in contrast with the conventional method in which a light shielding plate is made separately from the plate-shaped lens and the former is caused to adhere to the latter. Therefore, in the invention-no special apparatus is required for registering the light shielding-layer and the plate-shaped lens.
Furthermore, there is no risk of the light shielding layer being shifted upward or crosswise from the plate-shaped lens so that a plate-shaped lens free from flare and uneven light quantity can be constructed and a light shielding layer for the plate-shaped lens can be prepared.
Claims (7)
1. A light shielding layer of a plate-shaped lens with a plurality of lens members arranged in'the same plane, which light shielding layer shields light in the areas other than the effective light passing areas of said plate-shaped lens and is made of an opaque ink layer.
2. A method of forming a light shielding layer of a plate-shaped lens with a plurality of lens members arranged in the same plane, by printing an opaque ink layer on said plate-shaped lens or by transferring the same to said plate-shaped lens, said light shielding layer shielding light in the areas other than the effective light passing areas of said plate-shaped lens.
3. A method of forming a light shielding layer of a plate-shaped lens as in claim 2, wherein said ink layer is formed by printing the same after said plate-shaped lens is molded.
4. A method of forming a light shielding layer of a plate-shaped lens as in claim 2, wherein said ink layer is formed by transferring said ink layer to said plate-shaped lens when said plate-shaped lens is molded.
5. A construction of a plate-shaped lens with a plurality of lens members arranged in the same plane, including a light shielding layer for shielding light from the areas of said plate-shaped lens other than the light passing areas of said plateshaped lens) said light shielding layer made of an opaque ink layer.
6. A plate-shaped lens substantially as hereinbefore described with reference to Figures 1 (b) or 2 of the accompanying drawing.
7. A method of making a plate-shaped lens substantially as hereinbefore described with reference to Figures 1 (b) or 2 of the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8223880A JPS578502A (en) | 1980-06-17 | 1980-06-17 | Formation of light shielding layer for platelike lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2077939A true GB2077939A (en) | 1981-12-23 |
| GB2077939B GB2077939B (en) | 1984-06-06 |
Family
ID=13768824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8115326A Expired GB2077939B (en) | 1980-06-17 | 1981-05-19 | A plate-shaped lens having a light shielding opaque ink layer |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS578502A (en) |
| DE (1) | DE3123928C2 (en) |
| GB (1) | GB2077939B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0309947A2 (en) * | 1987-09-28 | 1989-04-05 | Honeywell Inc. | Method for producing apertures on a lenslet array |
| EP0309948A2 (en) * | 1987-09-28 | 1989-04-05 | Honeywell Inc. | Lenslet array and method for providing apertures on lenslet arrays |
| US5648874A (en) * | 1994-06-29 | 1997-07-15 | Fujitsu Limited | Optical apparatus |
| WO2003079060A1 (en) * | 2002-03-14 | 2003-09-25 | Corning Incorporated | Lens array and method for fabricating the lens array |
| EP2455782A1 (en) * | 2010-11-17 | 2012-05-23 | Joo Hyun Lee | Lens array sheet |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0239103A (en) * | 1988-07-29 | 1990-02-08 | Omron Tateisi Electron Co | Lens array |
| JP4779590B2 (en) * | 2005-11-18 | 2011-09-28 | 大日本印刷株式会社 | Light control sheet, surface light source device |
| JP5087239B2 (en) | 2006-06-26 | 2012-12-05 | 株式会社ミツトヨ | Photoelectric encoder |
| JP5918938B2 (en) | 2011-06-30 | 2016-05-18 | 日本板硝子株式会社 | Lens array plate and erecting equal-magnification lens array plate manufacturing method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2164086C3 (en) * | 1971-12-23 | 1980-11-13 | Philips Patentverwaltung Gmbh, 2000 Hamburg | Miniaturized lens matrix |
| JPS5546596B2 (en) * | 1973-02-15 | 1980-11-25 | ||
| DE2649886A1 (en) * | 1976-10-29 | 1978-05-03 | Agfa Gevaert Ag | Modular lenticular screen element - is injection moulding designed for easy assembly in two or three dimensions in square or hexagonal array |
-
1980
- 1980-06-17 JP JP8223880A patent/JPS578502A/en active Pending
-
1981
- 1981-05-19 GB GB8115326A patent/GB2077939B/en not_active Expired
- 1981-06-16 DE DE19813123928 patent/DE3123928C2/en not_active Expired
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0309947A2 (en) * | 1987-09-28 | 1989-04-05 | Honeywell Inc. | Method for producing apertures on a lenslet array |
| EP0309948A2 (en) * | 1987-09-28 | 1989-04-05 | Honeywell Inc. | Lenslet array and method for providing apertures on lenslet arrays |
| EP0309948A3 (en) * | 1987-09-28 | 1990-06-13 | Honeywell Inc. | Lenslet array and method for providing apertures on lenslet arrays |
| EP0309947A3 (en) * | 1987-09-28 | 1990-06-13 | Honeywell Inc. | Method for producing apertures on a lenslet array |
| US5648874A (en) * | 1994-06-29 | 1997-07-15 | Fujitsu Limited | Optical apparatus |
| WO2003079060A1 (en) * | 2002-03-14 | 2003-09-25 | Corning Incorporated | Lens array and method for fabricating the lens array |
| US6917474B2 (en) | 2002-03-14 | 2005-07-12 | Corning Incorporated | Lens array and method for fabricating the lens array |
| EP2455782A1 (en) * | 2010-11-17 | 2012-05-23 | Joo Hyun Lee | Lens array sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3123928C2 (en) | 1983-07-28 |
| DE3123928A1 (en) | 1982-02-25 |
| GB2077939B (en) | 1984-06-06 |
| JPS578502A (en) | 1982-01-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19940519 |