JPS6473861A - Image reading method - Google Patents

Image reading method

Info

Publication number
JPS6473861A
JPS6473861A JP62229597A JP22959787A JPS6473861A JP S6473861 A JPS6473861 A JP S6473861A JP 62229597 A JP62229597 A JP 62229597A JP 22959787 A JP22959787 A JP 22959787A JP S6473861 A JPS6473861 A JP S6473861A
Authority
JP
Japan
Prior art keywords
subscan direction
value
sampling pitch
sampling
alpha
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
Application number
JP62229597A
Other languages
Japanese (ja)
Other versions
JPH0681228B2 (en
Inventor
Yoshimi Takasaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Priority to JP62229597A priority Critical patent/JPH0681228B2/en
Publication of JPS6473861A publication Critical patent/JPS6473861A/en
Publication of JPH0681228B2 publication Critical patent/JPH0681228B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Radiography Using Non-Light Waves (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Fax Reproducing Arrangements (AREA)

Abstract

PURPOSE:To reduce a foldover noise in a subscan direction, by setting the diamater of a light in the subscan direction at a value exceeding a range of unifold and within double of a sampling pitch in the subscan direction. CONSTITUTION:A beam diameter adjusting optical system 21 is adjusted so that the diameter of a laser beam L in the subscan direction can be set larger than that of a scanning line interval (d) (sampling pitch) and within the two-fold. Assuming a ratio (alpha) that is the ratio in which beam width DL protrudes from the sampling pitch (d) as (alpha)=0.5, an amplitude value goes to a value 0 at the 1/2 of a sampling angular frequency 2pi/d, that is, pi/d, and even in a frequency component with the value more than that, a foldover noise part N is sufficiently attenuated.
JP62229597A 1987-09-16 1987-09-16 Image reader Expired - Lifetime JPH0681228B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62229597A JPH0681228B2 (en) 1987-09-16 1987-09-16 Image reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62229597A JPH0681228B2 (en) 1987-09-16 1987-09-16 Image reader

Publications (2)

Publication Number Publication Date
JPS6473861A true JPS6473861A (en) 1989-03-20
JPH0681228B2 JPH0681228B2 (en) 1994-10-12

Family

ID=16894673

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62229597A Expired - Lifetime JPH0681228B2 (en) 1987-09-16 1987-09-16 Image reader

Country Status (1)

Country Link
JP (1) JPH0681228B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03209449A (en) * 1990-01-12 1991-09-12 Fuji Photo Film Co Ltd Radiograph information reader

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61245670A (en) * 1985-04-23 1986-10-31 Konishiroku Photo Ind Co Ltd Medical image information reader

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61245670A (en) * 1985-04-23 1986-10-31 Konishiroku Photo Ind Co Ltd Medical image information reader

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03209449A (en) * 1990-01-12 1991-09-12 Fuji Photo Film Co Ltd Radiograph information reader

Also Published As

Publication number Publication date
JPH0681228B2 (en) 1994-10-12

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