JPS6467742A - Optical reproducing device - Google Patents

Optical reproducing device

Info

Publication number
JPS6467742A
JPS6467742A JP22604487A JP22604487A JPS6467742A JP S6467742 A JPS6467742 A JP S6467742A JP 22604487 A JP22604487 A JP 22604487A JP 22604487 A JP22604487 A JP 22604487A JP S6467742 A JPS6467742 A JP S6467742A
Authority
JP
Japan
Prior art keywords
knife edge
edge
adjustment
slit
light flux
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
Application number
JP22604487A
Other languages
Japanese (ja)
Inventor
Toru Sekiguchi
Yoshihiro Sasaki
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP22604487A priority Critical patent/JPS6467742A/en
Publication of JPS6467742A publication Critical patent/JPS6467742A/en
Pending legal-status Critical Current

Links

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE:To easily and accurately execute the position adjustment of a knife edge by providing a slit to the knife edge for focus error detection. CONSTITUTION:A knife edge 15 is provided with a slit 151 of an elliptic shape, whose longer diameter is parallel to the edge of the knife edge 15 and whose width (d) is correspondent to a beam diameter in the focus position of one light flux. By moving the knife edge 15 in an (a) direction or a (c) direction and adjusting the knife edge 15 to a position where a photodetector output (S+S) goes to be maximum, the knife edge 15 is adjusted to a focus position (b) of a reflected light flux. Next, the knife edge 15 is moved in an h' direction and matched to an optical axis center. Then, the adjustment is ended. Thus, the position adjustment of the knife edge 15 can be easily and accurately executed.
JP22604487A 1987-09-08 1987-09-08 Optical reproducing device Pending JPS6467742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22604487A JPS6467742A (en) 1987-09-08 1987-09-08 Optical reproducing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22604487A JPS6467742A (en) 1987-09-08 1987-09-08 Optical reproducing device

Publications (1)

Publication Number Publication Date
JPS6467742A true JPS6467742A (en) 1989-03-14

Family

ID=16838905

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22604487A Pending JPS6467742A (en) 1987-09-08 1987-09-08 Optical reproducing device

Country Status (1)

Country Link
JP (1) JPS6467742A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02117729U (en) * 1989-03-06 1990-09-20
JP2002303802A (en) * 2001-04-04 2002-10-18 Nikon Corp Focal position regulating device for optical system to be inspected, method of measuring focal position of optical system and telescopic optical system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02117729U (en) * 1989-03-06 1990-09-20
JP2002303802A (en) * 2001-04-04 2002-10-18 Nikon Corp Focal position regulating device for optical system to be inspected, method of measuring focal position of optical system and telescopic optical system

Similar Documents

Publication Publication Date Title
ES462141A1 (en) Continuously variable reduction scanning optics drive
ATE30799T1 (en) DEVICE FOR FOCUS ERROR DETECTION.
ES462609A1 (en) Bi-axial scanning device for following the outline of a template
JPS57179954A (en) Optical type disc player
JPS6467742A (en) Optical reproducing device
JPS55125417A (en) Photodetector
JPS5767815A (en) Measuring method for position of reflector using light
JPS5284748A (en) Device for finely adjusting position at which laser light is focused
JPS5466152A (en) Lens terminal for optical transmission
GB1534923A (en) Line or edge follower
JPS56103302A (en) Method for positioning lens in photodetector array
JPS56165937A (en) Optical recorder and reproducer
EP0380260A3 (en) Ophthalmic measurement apparatus
JPS57159286A (en) Laser working device
JPS643527A (en) Double beam spectrophotometer
EP0366890A3 (en) Laser diode scanner with enhanced visibility over extended working distance
JPS55142423A (en) Detector of focus position for optical stylus
JPS5757004A (en) Reflective antenna
JPS5784362A (en) Electromagnetic oscillograph
JPS6488926A (en) Hologram optical pick-up
JPS6488931A (en) Servo optical pick-up device
JPS6426119A (en) Light beam shape measuring instrument
JPS6431005A (en) Measuring method for external shape of cubic body
JPS56146109A (en) Photometric device
JPS6448241A (en) Optical recording and reproducing device