Title:
クロマティック共焦点センサ
Document Type and Number:
Japanese Patent JP5011166
Kind Code:
B2
Abstract:
A chromatically dispersive objective (100) may be utilized in optical pens for chromatic range sensing. The objective includes a negative power doublet lens (101) and a positive power lens portion (105). The Abbe numbers of lenses included in the positive power lens portion (105) may be between the Abbe numbers of the two portions of the doublet lens (101). The relationship between the Abbe numbers of the materials used in two portions of the doublet lens is generally opposite to their relationship as used in standard doublet lenses of similar geometry. The doublet lens (101) may have a negative spherical aberration which effectively cancels the positive spherical aberration that arises in the positive lens portion. In one embodiment all of the lens elements in the lens configuration are spherical. The objective can be implemented with dimensions which fit a standard commercial optical pen, while providing improved range sensing performance.
Inventors:
Eric Altendorff
Application Number:
JP2008051722A
Publication Date:
August 29, 2012
Filing Date:
March 03, 2008
Export Citation:
Assignee:
Mitutoyo Corporation
International Classes:
G01B11/02; G01B11/00; G02B13/00
Domestic Patent References:
| JP2004101532A | ||||
| JP2002350721A | ||||
| JP200778485A |
Foreign References:
| US20060109483 |
Attorney, Agent or Firm:
Satoshi Takaya
Keisuke Matsuyama
Tsuyoshi Makino
Keisuke Matsuyama
Tsuyoshi Makino