JPS5814127A - Illumination device for copying machine - Google Patents
Illumination device for copying machineInfo
- Publication number
- JPS5814127A JPS5814127A JP11157481A JP11157481A JPS5814127A JP S5814127 A JPS5814127 A JP S5814127A JP 11157481 A JP11157481 A JP 11157481A JP 11157481 A JP11157481 A JP 11157481A JP S5814127 A JPS5814127 A JP S5814127A
- Authority
- JP
- Japan
- Prior art keywords
- condenser lens
- light source
- lens group
- source lamp
- high heat
- 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
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
- G03B27/54—Lamp housings; Illuminating means
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Light Sources And Details Of Projection-Printing Devices (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は光源ラングとコンデンサーレンズ群とを有する
複写機の照明装置、特に光源ランプが高出力で高熱を発
生する複写機の照明装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lighting device for a copying machine having a light source rung and a condenser lens group, and particularly to a lighting device for a copying machine in which the light source lamp has a high output and generates high heat.
従来、光源ラングが高出力で高熱を発生する複写機にお
いては、コンデンサーレンズ群の熱破損を防止するため
に、（１）光源ランプとコンデンサーレンズ群との距離
を大きくすること、（２）光源ランプとコンデンサーレ
ンズ群との間に熱線吸収フィルターを配置すること、（
３）光源ラング、コンデンサーレンズ等をファンで空冷
すること等が、個々に又は組合わされて実施されている
。しかし、これら従来の技術の冷却性能は満足できるも
のではなく、熱線吸収フィルターやコンデンサーレンズ
群が熱破損することが多々発生している。また、光源ラ
ンプとコンデンサーレンズ群との距離を大きくすること
は照明装置を大型化する欠点を有するだけでなく、光源
ラングの光量を有効に利用できないという欠点も伴う。Conventionally, in copying machines where the light source lamp has high output and generates high heat, in order to prevent heat damage to the condenser lens group, (1) increasing the distance between the light source lamp and the condenser lens group; (2) increasing the distance between the light source lamp and the condenser lens group; Placing a heat absorption filter between the lamp and the condenser lens group, (
3) Cooling the light source rung, condenser lens, etc. with a fan is performed individually or in combination. However, the cooling performance of these conventional techniques is not satisfactory, and heat damage to the heat ray absorption filter and condenser lens group often occurs. Furthermore, increasing the distance between the light source lamp and the condenser lens group not only has the disadvantage of increasing the size of the lighting device, but also has the disadvantage that the amount of light from the light source rung cannot be used effectively.
本発明は、上記従来の複写機の照明装置の問題を鑑みて
なされたものである。その目的とするところは、コンパ
クトで、光源ランプの光量を有効に利用し、かつコンデ
ンサーレンズの熱破損を有効に防止することができる複
写機の照明装置を提供することである。The present invention has been made in view of the above-mentioned problems of the conventional lighting device of a copying machine. The object is to provide a lighting device for a copying machine that is compact, can effectively utilize the light intensity of a light source lamp, and can effectively prevent thermal damage to a condenser lens.
本発明の構成上の特徴とするところは、光源ランプとコ
ンデンサーレンズ群とを有する複写機の照明装置におい
て、上記光源ランプとコンデンサーレンズ群との間、又
はコンデンサーレンズ群の光源ランプ側に、光源ラング
側から順に、耐熱性が高い材質で構成され表面に熱線吸
収コートを施したガラス部材と、熱線吸収性の高い材質
のガラス部材とを配置したことである。The structural feature of the present invention is that in a lighting device for a copying machine having a light source lamp and a condenser lens group, a light source is provided between the light source lamp and the condenser lens group, or on the light source lamp side of the condenser lens group. A glass member made of a material with high heat resistance and whose surface is coated with a heat ray absorption coating, and a glass member made of a material with high heat ray absorption properties are arranged in order from the rung side.
従って、本発明によれば、光源ランプとコンデンサーレ
ンズ群とを近接させることができる。その結果、複写機
の照明装置をコンパクトにすることができ、また光源ラ
ンプの光量を有効に利用することができ、かつコンデン
サーレンズや熱線吸収ガラス部材の熱破損を有効に防止
することができる。また、本発明は、耐熱性が高い材質
で構成され表面に熱線吸収コートを施したガラス部材と
、熱線吸収性の高い材質のガラス部材とをコンデンサー
レンズ群のレンズ部材として構成することにより、照明
装置の光学部品点数を減少させることができる。Therefore, according to the present invention, the light source lamp and the condenser lens group can be brought close to each other. As a result, the lighting device of the copying machine can be made compact, the amount of light from the light source lamp can be used effectively, and the condenser lens and the heat ray absorbing glass member can be effectively prevented from being damaged by heat. Further, the present invention provides a lens member for a condenser lens group that includes a glass member made of a material with high heat resistance and whose surface is coated with a heat ray absorption coating, and a glass member made of a material with high heat ray absorption property. The number of optical parts of the device can be reduced.
以下、本発明の実施例を図について説明する。Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第１実施例は、第１図に示すように、光源ランプ２とコ
ンデンサーレンズ４との間に、耐熱性の高い材質からな
る第１フィルタ一部材６と、熱線吸収性の高い材質から
なる第２フィルタ一部材８とを配置する。第１フィルタ
一部材６は、例えば耐熱温度５００℃以上の硼珪酸ガラ
スを使用するが、これは熱線吸収性はよくない。第１フ
ィルタ一部材の表面には熱線吸収コートを施す。第２フ
ィルタ一部材８は、耐熱温度が４００℃以下と低いが熱
線吸収性の高い材質、例えばリン酸塩系ガラスによって
構成する。以上の第１実施例においては、光源ランプか
ら発生する熱線が、第１フィルタ一部材６の熱線吸収コ
ートと第２フィルタ一部材８とによって吸収されるから
、コンデンサーレンズ４が熱破損する恐れが少ない。ま
た、比較的耐熱性の低い第２フィルタ一部材８も熱線吸
収コートを介して光源ランプに対面するから、第２フィ
ルタ一部材８の熱破損の恐れも少ない。In the first embodiment, as shown in FIG. 1, a first filter member 6 made of a material with high heat resistance and a first filter member 6 made of a material with high heat ray absorption are provided between a light source lamp 2 and a condenser lens 4. 2 filter member 8 are arranged. The first filter member 6 is made of, for example, borosilicate glass with a heat resistance temperature of 500° C. or higher, but this glass has poor heat ray absorption properties. A heat ray absorbing coat is applied to the surface of the first filter member. The second filter member 8 is made of a material that has a low heat resistance temperature of 400° C. or less but has high heat ray absorbing properties, such as phosphate glass. In the first embodiment described above, the heat rays generated from the light source lamp are absorbed by the heat ray absorbing coat of the first filter member 6 and the second filter member 8, so there is no risk of thermal damage to the condenser lens 4. few. Moreover, since the second filter member 8, which has relatively low heat resistance, also faces the light source lamp via the heat ray absorption coat, there is less risk of thermal damage to the second filter member 8.
第２実施例は、第２図に示すように、光源ランデ１２と
、第１コンデンサーレンズ１４、第２コンデンサーレン
ズ１６及（ｊｔ４５コンデンサーレンズ１８からなるコ
ンデンサーレンズ群２０とから構成される。第１コンデ
ンサーレンズ１４は、例えば耐熱温度５００℃以上の硼
珪酸ガラスで構成するが、この材質は熱吸収性はよくな
い。第１コンデンサーレンズ１４の表面には熱線吸収コ
ートを施す。第２コンデンサーレンズ１６は、耐熱温度
が４００℃以下と低いが熱線吸収性の高い材質、例えば
リン酸塩系ガラスによって構成する。第３コンデンサー
レンズは一般の光学ガラスによって構成されるレンズで
ある。コンデンサーレンズ群２０は、全体として焦光性
を有する。以上の第２実施例においては、コンデンサー
レンズ群２０の光源ラング１２側のコンデンサーレンズ
１４．１６が熱線吸収機能を有するから、熱線吸収フィ
ルタ一部材が不要となり、第１実施例に比較して光学部
品点数が少ない特徴がある。また、レンズやフィルター
の光学部品と光源レンズとの距離、及び光学部材の有効
径を一定にして考えると、第２実施例は、コンデンサー
レンズ群を第１実施例よりも光源ラングに近づけること
ができるから、光源ランプの光量を第１実施例よりも有
効に利用することができる。The second embodiment, as shown in FIG. The condenser lens 14 is made of, for example, borosilicate glass with a heat resistance temperature of 500° C. or higher, but this material does not have good heat absorption properties.The surface of the first condenser lens 14 is coated with a heat ray absorption coating.The second condenser lens 16 is made of a material that has a low heat resistance temperature of 400°C or less but has high heat ray absorption properties, such as phosphate glass.The third condenser lens is a lens made of general optical glass.The condenser lens group 20 is , has a focusing property as a whole.In the second embodiment described above, since the condenser lenses 14 and 16 on the light source rung 12 side of the condenser lens group 20 have a heat ray absorption function, a heat ray absorption filter member is not required. It has a feature that the number of optical parts is smaller than that of the first embodiment.Also, assuming that the distance between the optical parts of the lens or filter and the light source lens and the effective diameter of the optical member are constant, the second embodiment Since the condenser lens group can be placed closer to the light source rung than in the first embodiment, the amount of light from the light source lamp can be used more effectively than in the first embodiment.
第１図は第１実施例の光学図、第２図は第２実施例の光
学図である。
２°・・光源ラング、４・・・コンデンサーレンズ、６
・・・第１フィルタ一部材、８・・・第２フィルタ一部
材、１２・・・光源ラング、１４・・・第１コンデンサ
ーレンズ、１６・・・第２コンデンサーレンズ、１８・
・・第３コンデンサーレンズ、２ｏ・・・コンデンサー
レンズ群FIG. 1 is an optical diagram of the first embodiment, and FIG. 2 is an optical diagram of the second embodiment. 2°...Light source rung, 4...Condenser lens, 6
... First filter member, 8... Second filter member, 12... Light source rung, 14... First condenser lens, 16... Second condenser lens, 18...
...Third condenser lens, 2o...Condenser lens group
Claims (1)
写機の照明装置において、上記光源ランプとコンデンサ
ーレンズ群との間、又はコンデンサーレンズ群の光源ラ
ング側に、光源ラング側から順に、耐熱性が高い材質で
構成され表面に熱線吸収コートを施したガラス部材と、
熱線吸収性の高い材質のガラス部材とを配置したことを
特徴とする複写機の照明装置。(1) In a lighting system for a copying machine that has a light source lamp and a condenser lens group, high heat resistance is provided between the light source lamp and the condenser lens group, or on the light source rung side of the condenser lens group, starting from the light source rung side. A glass member made of a material with a heat ray absorption coating on its surface,
A lighting device for a copying machine, characterized in that a glass member made of a material with high heat ray absorption is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11157481A JPS5814127A (en) | 1981-07-16 | 1981-07-16 | Illumination device for copying machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11157481A JPS5814127A (en) | 1981-07-16 | 1981-07-16 | Illumination device for copying machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5814127A true JPS5814127A (en) | 1983-01-26 |
Family
ID=14564821
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11157481A Pending JPS5814127A (en) | 1981-07-16 | 1981-07-16 | Illumination device for copying machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5814127A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4859034A (en) * | 1981-12-28 | 1989-08-22 | Seiko Epson Corporation | Liquid crystal optical printing apparatus |
-
1981
- 1981-07-16 JP JP11157481A patent/JPS5814127A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4859034A (en) * | 1981-12-28 | 1989-08-22 | Seiko Epson Corporation | Liquid crystal optical printing apparatus |
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