Patent ID: 11919114
Assignee: DISCO CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B  G | IPC B  G

Claim 1:
2. The measuring apparatus according to claim 1, further comprising:
a beam splitter disposed between the broadband light source and the mirror, for splitting light emitted from the broadband light source into a first optical path toward the mirror and a second optical path perpendicular to the first optical path; and
an optical system housing case housing the mirror and the beam splitter therein and having a first opening through which the first optical path passes and allows to reach light to the processing tool and a second opening through which the second optical path passes and allows to reach light to the chuck table,
wherein the chromatic aberration condensing lens is disposed between the broadband light source and the beam splitter, and a position of the chuck table is detected based on the intensity of the light reflected by the chuck table.