JPH0357665U - - Google Patents
Info
- Publication number
- JPH0357665U JPH0357665U JP11847989U JP11847989U JPH0357665U JP H0357665 U JPH0357665 U JP H0357665U JP 11847989 U JP11847989 U JP 11847989U JP 11847989 U JP11847989 U JP 11847989U JP H0357665 U JPH0357665 U JP H0357665U
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal shutter
- original
- photoelectric conversion
- optical path
- 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
- 238000003705 background correction Methods 0.000 claims description 9
- 239000004973 liquid crystal related substance Substances 0.000 claims description 9
- 230000003287 optical effect Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims 3
- 239000011159 matrix material Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 8
- 239000011521 glass Substances 0.000 description 2
Landscapes
- Sampling And Sample Adjustment (AREA)
- Investigating Or Analysing Biological Materials (AREA)
Description
第１図〜第９図は本考案の画像読取装置のシエ
ーデイング補正方式の一実施例を示す図であり、
第１図はその画像読取装置のシエーデイング補正
方式を適用したスキヤナの構成図、第２図はその
周囲に基準原稿の設けられたコンタクトガラスを
示す図、第３図はその液晶シヤツタ素子の断面図
、第４図はそのシエーデイング補正の手順を示す
ブロツク図、第５図はそのシエーデイング補正前
のＣＣＤ出力を示す図、第６図はそのシエーデイ
ング補正後のＣＣＤ出力を示す図、第７図は第６
図に対応させた液晶シヤツタの光路形状を示す図
、第８図はシエーデイング補正前のＣＣＤ出力の
他の例を示す図、第９図は第８図に対応させた液
晶シヤツタの光路形状を示す図である。
１……スキヤナ、３……コンタクトガラス、４
，５……基準原稿、７……光源、｛８，９，１０
……ミラー、１２……レンズ｝光学手段、１１…
…液晶シヤツタ、１３……ＣＣＤ、１４……液晶
シヤツタ素子。
1 to 9 are diagrams showing an embodiment of the shading correction method of the image reading device of the present invention,
Figure 1 is a configuration diagram of a scanner to which the shading correction method of the image reading device is applied, Figure 2 is a diagram showing a contact glass around which a reference original is provided, and Figure 3 is a cross-sectional view of the liquid crystal shutter element. , FIG. 4 is a block diagram showing the procedure of the shading correction, FIG. 5 is a diagram showing the CCD output before the shading correction, FIG. 6 is a diagram showing the CCD output after the shading correction, and FIG. 7 is a diagram showing the CCD output after the shading correction. 6
Figure 8 shows another example of the CCD output before shading correction. Figure 9 shows the optical path shape of the liquid crystal shutter corresponding to Figure 8. It is a diagram. 1...Sciyana, 3...Contact glass, 4
, 5... Reference original, 7... Light source, {8, 9, 10
...Mirror, 12...Lens} Optical means, 11...
...Liquid crystal shutter, 13...CCD, 14...Liquid crystal shutter element.
Claims (1)
する光電変換手段と、原稿からの反射光を光電変
換手段に導入する光学手段と、原稿から光電変換
手段までの光路上に配置され電圧の印加により光
路を開閉する液晶シヤツタと、を備え、該液晶シ
ヤツタが複数の液晶シヤツタ素子をマトリツクス
状に有し、各液晶シヤツタ素子への電圧の印加を
調整することにより液晶シヤツタの形成する光路
形状を変化させ、シエーデイング補正することを
特徴とする画像読取装置のシエーデイング補正方
式。 A light source that projects light onto the original, a photoelectric conversion means that photoelectrically converts incident light, an optical means that introduces reflected light from the original into the photoelectric conversion means, and a voltage converter arranged on the optical path from the original to the photoelectric conversion means. a liquid crystal shutter that opens and closes an optical path in accordance with an applied voltage; the liquid crystal shutter has a plurality of liquid crystal shutter elements arranged in a matrix; the optical path shape formed by the liquid crystal shutter is adjusted by adjusting the voltage applied to each liquid crystal shutter element; A shading correction method for an image reading device characterized by changing the shading correction method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989118479U JPH073325Y2 (en) | 1989-10-09 | 1989-10-09 | Stool collection tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989118479U JPH073325Y2 (en) | 1989-10-09 | 1989-10-09 | Stool collection tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0357665U true JPH0357665U (en) | 1991-06-04 |
| JPH073325Y2 JPH073325Y2 (en) | 1995-01-30 |
Family
ID=31666642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989118479U Expired - Fee Related JPH073325Y2 (en) | 1989-10-09 | 1989-10-09 | Stool collection tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH073325Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004317239A (en) * | 2003-04-15 | 2004-11-11 | Toyo Kizai Kagaku Kk | Smearing rod having flexibility and specimen sampling tube |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5344992U (en) * | 1976-09-21 | 1978-04-17 |
-
1989
- 1989-10-09 JP JP1989118479U patent/JPH073325Y2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5344992U (en) * | 1976-09-21 | 1978-04-17 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004317239A (en) * | 2003-04-15 | 2004-11-11 | Toyo Kizai Kagaku Kk | Smearing rod having flexibility and specimen sampling tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH073325Y2 (en) | 1995-01-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |