JPH0258233U - - Google Patents
Info
- Publication number
- JPH0258233U JPH0258233U JP11657889U JP11657889U JPH0258233U JP H0258233 U JPH0258233 U JP H0258233U JP 11657889 U JP11657889 U JP 11657889U JP 11657889 U JP11657889 U JP 11657889U JP H0258233 U JPH0258233 U JP H0258233U
- Authority
- JP
- Japan
- Prior art keywords
- amount
- light
- lamp
- control circuit
- light source
- 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
Landscapes
- Exposure Or Original Feeding In Electrophotography (AREA)
- Control Of Exposure In Printing And Copying (AREA)
Description
第１図は本考案の露光量安定化装置の実施例を
示す概略図、第２図はその制御回路装置を示すブ
ロツク図、第３図は制御回路から点灯装置に与え
られる制御パルスとそれに対応したランプ電流と
を示す図、第４図ａ，ｂは蛍光灯の起動直後から
の光出力の変化特性を示す図、第５図及び第６図
は本考案の実施例を示す図である。
１……原稿コンタクトガラス、２……露光ラン
プ、３……ランプケーシング、４……フオトダイ
オード、１０……制御回路、１１，１２……オペ
アンプ、１３……パルス幅変調器、１４……パル
ス発生器、１５……サーミスタ、１６……オペア
ンプ（比較器）、１８……表示ランプ、２０……
調光安定器、２３……発振器、２５……フイラメ
ント電流回路、２６……ランプ電流回路、２７…
…スイツチング回路。
Fig. 1 is a schematic diagram showing an embodiment of the exposure stabilizing device of the present invention, Fig. 2 is a block diagram showing its control circuit device, and Fig. 3 is a control pulse given to the lighting device from the control circuit and its corresponding correspondence. FIGS. 4a and 4b are diagrams showing the change characteristics of the light output immediately after the fluorescent lamp is started, and FIGS. 5 and 6 are diagrams showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Original contact glass, 2... Exposure lamp, 3... Lamp casing, 4... Photodiode, 10... Control circuit, 11, 12... Operational amplifier, 13... Pulse width modulator, 14... Pulse Generator, 15... Thermistor, 16... Operational amplifier (comparator), 18... Display lamp, 20...
Dimming ballast, 23... Oscillator, 25... Filament current circuit, 26... Lamp current circuit, 27...
...Switching circuit.
補正 平１．１１．１
実用新案登録請求の範囲を次のように補正する
。Amendment 1.11.1 The scope of claims for utility model registration is amended as follows.
【実用新案登録請求の範囲】
原稿を照明する光源ランプと、該ランプを付勢
する点灯装置と、該ランプの光出力を検出する光
検出器と、該光検出器から得られる検知量に応じ
て該光出力が第１の基準値になるように点灯装置
の該ランプに対する供給電力を調節する制御回路
とを有する露光量安定化装置において、該光検出
器から得られる検知量が前記第１の基準値より低
い第２の基準値に達しないとき警告を発する警告
報知器とを設けたことを特徴とする露光量安定化
装置。[Claims for Utility Model Registration] A light source lamp that illuminates the original , a lighting device that energizes the lamp, a photodetector that detects the light output of the lamp, and a detected amount obtained from the photodetector. and a control circuit that adjusts the power supplied to the lamp by the lighting device so that the light output becomes a first reference value according to the amount of light detected by the photodetector . An exposure amount stabilizing device comprising: a warning alarm that issues a warning when a second reference value lower than the first reference value is not reached .
Claims (1)
、該光源ランプを点灯させる点灯手段と、ランプ
の光出力を検出する光量検出器と、前記光量検出
器から得られる検知量に応じて前記点灯手段の前
記光源ランプに対する供給電力を調節する制御回
路とを有する露光量安定化装置において、前記制
御回路にての供給電力の調節量が所定量以上にな
つたことを前記光量検出器からの出力に基づいて
検知することを特徴とする露光量安定化装置。 A light source lamp for illuminating a specific area, a lighting means for lighting the light source lamp, a light amount detector for detecting the light output of the lamp, and the lighting means according to the detected amount obtained from the light amount detector. and a control circuit for adjusting power supplied to the light source lamp, wherein an output from the light amount detector indicates that the amount of adjustment of the power supplied by the control circuit has exceeded a predetermined amount. An exposure stabilizing device characterized by detecting based on the exposure amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11657889U JPH0258233U (en) | 1989-10-05 | 1989-10-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11657889U JPH0258233U (en) | 1989-10-05 | 1989-10-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0258233U true JPH0258233U (en) | 1990-04-26 |
Family
ID=31359240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11657889U Pending JPH0258233U (en) | 1989-10-05 | 1989-10-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0258233U (en) |
-
1989
- 1989-10-05 JP JP11657889U patent/JPH0258233U/ja active Pending
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