Test device for calibrating a laser device

Patent metadata

Field	Value
Publication number	US-9801760-B2
Application number	US-201114366094-A
Country	US
Kind code	B2
Filing date	Dec 13, 2011
Priority date	Dec 13, 2011
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A test device to calibrate the pulse energy of a laser device which provides pulsed laser radiation includes a measuring head with multiple measuring probes. The test device is used in such a way that by means of the laser radiation, multiple test ablations are made on a test surface, in an arrangement corresponding to the relative spatial arrangement of the measuring probes, and the depths of the test ablations are then measured, with simultaneous use of the multiple measuring probes of the measuring head.

First claim

The invention claimed is:

1. A method comprising:
making, with pulsed laser radiation from a laser device, multiple test ablations on a test surface, the multiple test ablations formed in an arrangement corresponding to a relative spatial arrangement of a plurality of measuring probes on a measuring head of a separate test device;
aligning a shape marking on the test surface with a complimentary shape marking on the test device to ensure a single relative angle of rotation orientation between the test surface and the measuring head, wherein the relative spatial arrangement of the multiple test ablations align with the plurality of measuring probes on the measuring head of the test device when the test surface and the measuring head are arranged in the single relative angle of rotation;
simultaneously measuring, with the separate test device, a depth of each of the test ablations using the multiple measuring probes of the measuring head; and
determining a relationship between a pulse energy of the pulsed laser radiations that formed each of the multiple test ablations and the depth of each of the test ablations.

2. The method of claim 1 , wherein the measuring head includes three measuring probes.

3. The method of claim 1 , wherein the test surface comprises a test disc with a circular outline, and wherein the measuring probes are arranged in the measuring head at equal angular intervals along an imaginary circular line.

4. The method of claim 3 , wherein the test disc and the measuring head each include an index marking for aligning the test surface and the measuring head in the single relative angle of rotation.

5. The method of claim 4 , wherein the index markings are implemented as color markings.

6. The method of claim 3 , wherein the shape marking of the test disc comprises a cut off edge of a segment of the circular course of the test disc, and wherein the test device includes a receiving area with the complimentary shape marking.

7. The method of claim 1 , further comprising:
reading, with a reading device, an identifying code on a test object which forms the test surface.

Assignees

• Goos Evi
• Donitzky Christof
• Wuellner Christian
• Wavelight Gmbh

Inventors

• Goos Evi
• Donitzky Christof
• Wuellner Christian

Classifications

• A61B2017/00482

  with a code · CPC title

• B23K26/0626

  Energy control of the laser beam (B23K26/0622 takes precedence) · CPC title

• B23K26/705

  Beam measuring devices · CPC title

• A61F9/00802 Primary

  for photoablation · CPC title

• A61B2018/00988

  Means for storing information, e.g. calibration constants, or for preventing excessive use, e.g. usage, service life counter · CPC title