Patent ID: 11860097
Assignee: DISCO CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A measuring apparatus comprising:
a holding table that holds a measurement-target object; and
a measuring unit that measures a height or a thickness of the measurement-target object held by the holding table,
the measuring unit including
a light source unit,
an optical fiber that guides light emitted by the light source unit, and
a light collector that focuses the light guided by the optical fiber on the measurement-target object held by the holding table,

the light source unit including
an excitation light source that emits excitation light,
a fluorescent body that emits fluorescence with a wavelength different from that of the excitation light when receiving the excitation light emitted by the excitation light source, and
a first collecting lens that focuses the excitation light emitted by the excitation light source on the fluorescent body,

wherein the measurement-target object is irradiated with the fluorescence emitted by the fluorescent body.