JPS6446725A - Rotary polygon mirror - Google Patents

Rotary polygon mirror

Info

Publication number
JPS6446725A
JPS6446725A JP62204829A JP20482987A JPS6446725A JP S6446725 A JPS6446725 A JP S6446725A JP 62204829 A JP62204829 A JP 62204829A JP 20482987 A JP20482987 A JP 20482987A JP S6446725 A JPS6446725 A JP S6446725A
Authority
JP
Japan
Prior art keywords
polygon mirror
rotary polygon
joining
regular
rotary
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
JP62204829A
Other languages
Japanese (ja)
Inventor
Hajime Ichikawa
Koji Miura
Kenzaburo Suzuki
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.)
Nikon Corp
Original Assignee
Nikon 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 Nikon Corp filed Critical Nikon Corp
Priority to JP62204829A priority Critical patent/JPS6446725A/en
Publication of JPS6446725A publication Critical patent/JPS6446725A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/08—Mirrors
    • G02B5/09—Multifaceted or polygonal mirrors, e.g. polygonal scanning mirrors; Fresnel mirrors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Optical Scanning Systems (AREA)

Abstract

PURPOSE:To use the titled mirror as a reference of the feed quantity of a cutter, by forming one rotary polygon mirror by joining two raw materials. CONSTITUTION:As for a rotary polygon mirror 100, assuming an optical axis is to be set symmetrically to joint surfaces PL1, PL2 positioned at 1/2 of height H of the polygon mirror, and simultaneously, assuming its two-dimensional scan to be a scan having the symmetry with respect to an x-x' cross section, two upper and lower polygon mirror elements 10, 20 become all the same shape, and by making two pieces of polygon mirror elements of all the same in advance, and joining regular polygon surfaces to each other, the rotary polygon mirror can be obtained. In this case, as for each polygon mirror element 10, 20, either of the upper and lower faces becomes a regular hexagon, a distance between an axis of rotation AX and each side becomes (r) being equal at each reflecting surface, two polygon mirror elements 10, 20 are made by a milling cutter based on each side of the regular hexagon as a reference. Finally, by joining the regular polygon surfaces to each other, the rotary polygon mirror 100 can be made. In such a way, the joint surface can be used as a reference at the time of working and at the time of inspection.
JP62204829A 1987-08-17 1987-08-17 Rotary polygon mirror Pending JPS6446725A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62204829A JPS6446725A (en) 1987-08-17 1987-08-17 Rotary polygon mirror

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62204829A JPS6446725A (en) 1987-08-17 1987-08-17 Rotary polygon mirror

Publications (1)

Publication Number Publication Date
JPS6446725A true JPS6446725A (en) 1989-02-21

Family

ID=16497074

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62204829A Pending JPS6446725A (en) 1987-08-17 1987-08-17 Rotary polygon mirror

Country Status (1)

Country Link
JP (1) JPS6446725A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5223700A (en) * 1989-07-07 1993-06-29 Sumitomo Electric Industries, Inc. Bar code reader having a polygon mirror providing different scan line lengths

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5223700A (en) * 1989-07-07 1993-06-29 Sumitomo Electric Industries, Inc. Bar code reader having a polygon mirror providing different scan line lengths

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