JPH02157701A - Lens array - Google Patents
Lens arrayInfo
- Publication number
- JPH02157701A JPH02157701A JP31144988A JP31144988A JPH02157701A JP H02157701 A JPH02157701 A JP H02157701A JP 31144988 A JP31144988 A JP 31144988A JP 31144988 A JP31144988 A JP 31144988A JP H02157701 A JPH02157701 A JP H02157701A
- Authority
- JP
- Japan
- Prior art keywords
- lens array
- optical
- ozone
- lenses
- optical performance
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 abstract description 23
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 abstract description 13
- 239000011521 glass Substances 0.000 abstract description 9
- 230000006866 deterioration Effects 0.000 abstract description 7
- 230000001681 protective effect Effects 0.000 abstract description 7
- 239000011347 resin Substances 0.000 abstract description 6
- 229920005989 resin Polymers 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 125000006850 spacer group Chemical group 0.000 abstract description 4
- 239000000853 adhesive Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 abstract description 3
- 238000003980 solgel method Methods 0.000 abstract description 3
- 229910003082 TiO2-SiO2 Inorganic materials 0.000 abstract 3
- 230000008021 deposition Effects 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 150000003839 salts Chemical class 0.000 abstract 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 abstract 1
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical compound [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 abstract 1
- 238000012856 packing Methods 0.000 abstract 1
- 239000002994 raw material Substances 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 239000010408 film Substances 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- 238000003491 array Methods 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- -1 alkali metal salts Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000011253 protective coating Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Landscapes
- Surface Treatment Of Optical Elements (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明は、複写機、ＬＥＤプリンターなどの電子写真記
録装置の光学系として有用なレンズアレイの改良に関し
、特にオゾンに対する耐久性を向上させる技術に関する
。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to the improvement of lens arrays useful as optical systems of electrophotographic recording devices such as copying machines and LED printers, and in particular to technology for improving durability against ozone. Regarding.
［従来の技術］
屈折率分布型ガラスレンズの多数本を光軸を平行にして
密着配列し一体化したレンズアレイは、従来の球面レン
ズ光学系に比べて、短焦点でありながら、広い画像幅が
得られるため、複写機、光プリンタ等の光学系として広
く使用され、装置のコンパクト化に太き（寄与している
。[Prior art] A lens array, which is made by closely arranging a large number of graded index glass lenses with their optical axes parallel to each other, has a short focus and a wide image width compared to conventional spherical lens optical systems. Because of this, it is widely used as optical systems in copying machines, optical printers, etc., and contributes to making devices more compact.
−例として、ＬＥＤ光プリンタの概略構造を第４図に示
す。- As an example, the schematic structure of an LED optical printer is shown in FIG.
同図において、１は感光ドラム、２は帯電器、３は光プ
リントヘッド、４は現像器、５は転写器、６は定着器、
７は用紙カセット、８は用紙スタッカである。In the figure, 1 is a photosensitive drum, 2 is a charger, 3 is an optical print head, 4 is a developer, 5 is a transfer device, 6 is a fixing device,
7 is a paper cassette, and 8 is a paper stacker.
光プリントヘッド３内には、高密度発光ダイオード（Ｌ
ＥＤ）アレイと、各ＬＥＤの発光を感光ドラム１面上に
集光させるレンズアレイが組み込まれており、電気信号
により選択的にＬＥＤを発光させることにより、感光ド
ラム１に静電潜像を形成させ、これにトナーをつけ、そ
の後用紙に転写する。Inside the optical print head 3, there are high-density light emitting diodes (L
ED) array and a lens array that focuses the light emitted from each LED onto the surface of the photosensitive drum 1. By selectively causing the LEDs to emit light based on an electric signal, an electrostatic latent image is formed on the photosensitive drum 1. Then apply toner to this, and then transfer it to paper.
上記に例示したＬＥＤ光プリンタを含めて、−般に電子
写真技術を用いた記録方式では、感光ドラムに電荷を帯
びさせるためのチャージャー（帯電器）が設けられてい
る。In general, recording systems using electrophotographic technology, including the LED optical printer exemplified above, are provided with a charger for charging the photosensitive drum.
［発明が解決しようとする問題点］
上記チャージャーには高電圧が印加されており、空気中
の酸素を励起し、オゾン（０，）を多量に発生させてい
る。[Problems to be Solved by the Invention] A high voltage is applied to the charger, which excites oxygen in the air and generates a large amount of ozone (0,).
このオゾンは空気中の水分と反応して硝酸を生成し、レ
ンズアレイ中のガラスレンズ表面を浸食し、ガラス内部
のアルカリ金属との析出物を作る。This ozone reacts with moisture in the air to produce nitric acid, which corrodes the surface of the glass lenses in the lens array and forms precipitates with alkali metals inside the glass.
この析出物はレンズ表面を曇らせて光学性能の劣化をも
たらす。This precipitate clouds the lens surface and causes deterioration of optical performance.
１つの対策として、レンズアレイ自体を２００°Ｃ前後
の温度で焼成して、レンズ表面のアルカリを前もって析
出させる処理を行なう方法もあるが、かかる処理のみで
は十分な劣化防止効果が得られていない。As one countermeasure, there is a method of firing the lens array itself at a temperature of around 200°C to precipitate alkali on the lens surface, but such treatment alone does not have a sufficient effect of preventing deterioration. .
［問題点を解決するための手段］
レンズアレイを構成するガラスレンズの表面に、ゾル−
ゲル法によりＴｉＯ，−５ｉＯ２の保護被膜を設ける。[Means for solving the problem] A sol is applied to the surface of the glass lens constituting the lens array.
A protective film of TiO, -5iO2 is provided by a gel method.
［作 用］
上記保護被膜を設けた場合、アルカリ金属塩の析出が抑
制され、その結果後述実施例に示すように、オゾン雰囲
気中における光学性能の劣化が大幅に低減される。[Function] When the above-mentioned protective film is provided, the precipitation of alkali metal salts is suppressed, and as a result, as shown in Examples below, deterioration of optical performance in an ozone atmosphere is significantly reduced.
［実施例］
以下本発明を図面に示した実施例に基づき詳細に説明す
る。[Example] The present invention will be described in detail below based on an example shown in the drawings.
第１図及び第２図において、１０はレンズアレイであり
、屈折率分布型ガラスロッドレンズ１１の多数本を互い
に光軸を平行にして密着配列し、樹脂基板１２．１３及
びスペーサー材１４で保持するとともに、空間部に樹脂
接着剤を充填して固着一体化した構造を成している。In FIGS. 1 and 2, 10 is a lens array, in which a large number of gradient index glass rod lenses 11 are arranged in close contact with each other with their optical axes parallel to each other, and are held by resin substrates 12 and 13 and spacer material 14. At the same time, the space is filled with a resin adhesive to form a fixed and integrated structure.
そしてレンズアレイ１００両端面１０Ａ、ＩＯＢ上には
、チタニウム・テトラｎブトキシドとシリコン・テトラ
エトキシドを出発原料とするゾルゲル法により、ＴｉＯ
□−Ｓｉ０ｇ薄膜１５が透明保護被膜として形成しであ
る。Then, on both end surfaces 10A of the lens array 100 and on the IOB, a TiO
□-Si0g thin film 15 is formed as a transparent protective coating.
一例として、まずシリコンテトラエトキシド３８ｇにエ
タノール４２ｇを加えて撹拌し、さらに３重量％希塩酸
ｊ３ｇを滴下して十分に撹拌し、シリコンテトラエトキ
シドを加水分解して溶液Ａを製作する。As an example, first, 42 g of ethanol is added to 38 g of silicon tetraethoxide and stirred, and then 3 g of 3% by weight diluted hydrochloric acid is added dropwise and thoroughly stirred to hydrolyze the silicon tetraethoxide to prepare solution A.
一方、チタニウム・ｎ−ブトキシド６ｇにエタノール１
７ｇを加え撹拌して溶液Ｂを製作する。On the other hand, 6 g of titanium n-butoxide and 1 ethanol
Add 7g and stir to prepare solution B.
次いで、溶液Ａに溶液Ｂを滴下しながら激しく撹拌して
、これら二液を反応させて溶液Ｃを製作する。Next, solution C is produced by dropping solution B into solution A and stirring vigorously to cause these two liquids to react.
得られた溶液Ｃをエタノールにて適当に希釈して、この
液に予め組立てであるレンズアレイ１０を浸漬する。The obtained solution C is appropriately diluted with ethanol, and the pre-assembled lens array 10 is immersed in this solution.
液からの引上げ後にレンズアレイを２００°Ｃの温度で
２時間焼成する。After being removed from the liquid, the lens array is baked at a temperature of 200° C. for 2 hours.
上記方法により、９ＴｉＯ２・９１ＳｉＯ□（モル％表
記）の組成を持つ被ｇ！１５が形成できる。By the above method, g! 15 can be formed.
以上のようにして得られた保護被膜付きのレンズアレイ
の耐オゾン性を見るため、該レンズアレイと保護被膜を
設けないレンズアレイとを、４０℃、８０％湿度、５
ｐｐｍオゾン濃度の雰囲気中に暴露し、一定時間経過毎
にこれらレンズアレイの光学性能（解像力、明るさ）を
調べた。その結果を第３図（イ）、（ロ）に示す。第３
図のうち、（イ）は解像力の変化を示し、縦軸は当初を
１００％としたＭＴＦ値の低下率を％表示している。In order to examine the ozone resistance of the lens array with the protective film obtained as described above, the lens array and the lens array without the protective film were heated at 40°C, 80% humidity, and
These lens arrays were exposed to an atmosphere with a ppm ozone concentration, and the optical performance (resolution, brightness) of these lens arrays was examined at fixed time intervals. The results are shown in Figures 3 (a) and (b). Third
In the figure, (a) shows the change in resolution, and the vertical axis shows the percentage decrease in the MTF value with the initial value being 100%.
また（口）はレンズ透過光量の変化を示し、縦軸は当初
１００％とした光量低下率を％表示している。In addition, (mouth) indicates the change in the amount of light transmitted through the lens, and the vertical axis indicates the rate of decrease in the amount of light, which was initially set to 100%, in %.
また（イ）及び（ロ）のグラフ中実線は本発明実施例の
レンズアレイであり、破線は比較例のレンズアレイであ
る。Further, the solid lines in the graphs (a) and (b) represent the lens array of the example of the present invention, and the broken line represents the lens array of the comparative example.
第３図のグラフから明らかなように、本発明に係る保護
被膜を設けたレンズアレイはオゾン雰囲気中においても
時間の経過に伴なう光学性能の劣化が極めて小さい。As is clear from the graph of FIG. 3, the lens array provided with the protective coating according to the present invention shows extremely little deterioration in optical performance over time even in an ozone atmosphere.
［発明の効果］
本発明によれば、ＴｉＯ□−８ｉＯ□被膜によるアルカ
リ金属塩析出抑制効果によって、オゾン雰囲気中におけ
る光学性能の劣化が極めて小さく、したがって複写機、
ＬＥＤ光プリプ９２２等高電圧印加り内部雰囲気に多量
のオゾンが発生する装置においても、長期間にわたり一
定した光学性能を維持することができる。[Effects of the Invention] According to the present invention, due to the effect of suppressing alkali metal salt precipitation by the TiO□-8iO□ film, deterioration of optical performance in an ozone atmosphere is extremely small, and therefore, copying machines,
Even in devices such as the LED light prep 922 where a high voltage is applied and a large amount of ozone is generated in the internal atmosphere, constant optical performance can be maintained over a long period of time.
また本発明に係る保護被膜は、ゾルゲル法により低温度
で形成できるため、ガラスレンズ以外に保持基板、スペ
ーサー、接着剤として有機樹脂材料を用いているレンズ
アレイであっても、樹脂材を傷めることな（レンズアレ
イの組立後においてレンズ面への膜付は処理を一挙に行
なうことができ、量産性に優れている。Furthermore, since the protective film according to the present invention can be formed at low temperatures using a sol-gel method, it will not damage the resin material even in lens arrays that use organic resin materials as holding substrates, spacers, and adhesives in addition to glass lenses. (After the lens array is assembled, the film can be applied to the lens surface all at once, making it suitable for mass production.
第１図は本発明の一実施例を示す側断面図、第２図は同
斜視図、第３図（イ）（ロ）は本発明品と従来品につい
て、オゾン雰囲気中で暴露試験を行なった結果を示すグ
ラフ、第４図は本発明に係るレンズアレイの用途の一例
としてＬＥＤ光プリンタを示す断面図である。
１・・・感光ドラム、２・・・帯電器、３・・・光プリ
ントヘッド、１０・・・レンズアレイ、１１・・・ガラ
スロッドレンズ、１２．１３・・・保持基板、１４・・
・スペーサー １５・・・ＴｉＯｚ−３ｔｏｗ膜。
第
図Figure 1 is a side sectional view showing an embodiment of the present invention, Figure 2 is a perspective view of the same, and Figures 3 (a) and (b) show the results of an exposure test in an ozone atmosphere for the product of the present invention and the conventional product. FIG. 4 is a cross-sectional view showing an LED optical printer as an example of the application of the lens array according to the present invention. DESCRIPTION OF SYMBOLS 1... Photosensitive drum, 2... Charger, 3... Optical print head, 10... Lens array, 11... Glass rod lens, 12.13... Holding board, 14...
・Spacer 15...TiOz-3tow film. Diagram
Claims (1)
とを特徴とするレンズアレイ。A lens array characterized in that lens end surfaces are coated with a TiO_2-SiO_2 film.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31144988A JPH02157701A (en) | 1988-12-09 | 1988-12-09 | Lens array |
| US07/810,347 US5638479A (en) | 1988-07-19 | 1991-12-17 | Optical part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31144988A JPH02157701A (en) | 1988-12-09 | 1988-12-09 | Lens array |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02157701A true JPH02157701A (en) | 1990-06-18 |
Family
ID=18017354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31144988A Pending JPH02157701A (en) | 1988-07-19 | 1988-12-09 | Lens array |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02157701A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100237710B1 (en) * | 1995-09-08 | 2000-01-15 | 니시무로 타이죠 | Liquid crystal device |
| JP2006113142A (en) * | 2004-10-12 | 2006-04-27 | Nippon Sheet Glass Co Ltd | Glass optical elemental and its manufacturing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4278632A (en) * | 1980-02-08 | 1981-07-14 | Westinghouse Electric Corp. | Method of conforming clear vitreous gal of silica-titania material |
| JPS62270911A (en) * | 1986-05-20 | 1987-11-25 | Stanley Electric Co Ltd | Optical fiber lens and lens array |
-
1988
- 1988-12-09 JP JP31144988A patent/JPH02157701A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4278632A (en) * | 1980-02-08 | 1981-07-14 | Westinghouse Electric Corp. | Method of conforming clear vitreous gal of silica-titania material |
| JPS62270911A (en) * | 1986-05-20 | 1987-11-25 | Stanley Electric Co Ltd | Optical fiber lens and lens array |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100237710B1 (en) * | 1995-09-08 | 2000-01-15 | 니시무로 타이죠 | Liquid crystal device |
| JP2006113142A (en) * | 2004-10-12 | 2006-04-27 | Nippon Sheet Glass Co Ltd | Glass optical elemental and its manufacturing method |
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