JPH01216851A - Laser marker - Google Patents

Laser marker

Info

Publication number
JPH01216851A
JPH01216851A JP4193288A JP4193288A JPH01216851A JP H01216851 A JPH01216851 A JP H01216851A JP 4193288 A JP4193288 A JP 4193288A JP 4193288 A JP4193288 A JP 4193288A JP H01216851 A JPH01216851 A JP H01216851A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
laser
liquid crystal
laser beam
liquid
2b
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
JP4193288A
Other versions
JP2621907B2 (en )
Inventor
Minoru Fujimoto
Kiyoe Iwaki
Koji Kuwabara
Kiyoshi Saito
Makoto Yano
Original Assignee
Hitachi 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

Links

Abstract

PURPOSE: To make possible the improvement of a laser utility factor by using a liquid with an index of refraction indicating a specific range of physical property value as a coolant.
CONSTITUTION: A laser marker projects a linear polarized laser beam 6 to be emitted from a pulsed laser to a liquid crystal mask 4 equipped with a liquid crystal cell part 1 to which pattern information is provided from the outside and with cooling parts 3a, 3b consisting of the liquid crystal cell part 1 sandwiched with sheet glass 2a, 2b on both sides and cooled by a coolant. The laser beam, which reflects the pattern information, of the transmission light penetrating the liquid crystals mask 4 is projected to a workpiece 7. In this way, the patter information is marked on the surface of the workpiece. The laser marker uses a liquid with a physical property value within a range of 1.4 to 1.53 of refractive index, for instance, silicone oil 8a, 8b, in addition to the sheet glass 2a, 2b employed in conformity with the wavelength of a linear deflected laser beam. Thus the reflection of the laser beam 6 in the surface between the liquid crystal mask 4 and an atmosphere and the Fresnel reflection generat ed in the sheet glass 2a, 2b, silicone oil 8a, 8b and the glass bases 9a, 9b of the liquid crystal cell part 1 are almost eliminated. Consequently, the laser marker which enables the laser utility factor to be improved is obtained.
COPYRIGHT: (C)1989,JPO&Japio
JP4193288A 1988-02-26 1988-02-26 Laser marker Expired - Lifetime JP2621907B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4193288A JP2621907B2 (en) 1988-02-26 1988-02-26 Laser marker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4193288A JP2621907B2 (en) 1988-02-26 1988-02-26 Laser marker

Publications (2)

Publication Number Publication Date
JPH01216851A true true JPH01216851A (en) 1989-08-30
JP2621907B2 JP2621907B2 (en) 1997-06-18

Family

ID=12622004

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4193288A Expired - Lifetime JP2621907B2 (en) 1988-02-26 1988-02-26 Laser marker

Country Status (1)

Country Link
JP (1) JP2621907B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5589955A (en) * 1991-05-21 1996-12-31 Seiko Epson Corporation Optical device and optical machining system using the optical device
CN103963480A (en) * 2014-05-22 2014-08-06 广州创乐激光设备有限公司 Scanning head of laser marking machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5589955A (en) * 1991-05-21 1996-12-31 Seiko Epson Corporation Optical device and optical machining system using the optical device
CN103963480A (en) * 2014-05-22 2014-08-06 广州创乐激光设备有限公司 Scanning head of laser marking machine
CN103963480B (en) * 2014-05-22 2016-01-20 广州创乐激光设备有限公司 A laser scanning header playing machine

Also Published As

Publication number Publication date Type
JP2621907B2 (en) 1997-06-18 grant

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