Patent ID: 11898912
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 10:
11. An inspection apparatus comprising:
an input optical system configured to irradiate a wafer with an input beam; and
a hyperspectral imaging (HSI) apparatus configured to generate a hyperspectral image based on an output beam that is generated by reflecting the input beam from the wafer,
wherein the HSI apparatus comprises:
a slit plate configured to introduce the output beam;
an aspherical mirror configured to reflect the introduced output beam;
a planar grating having a planar reflective surface configured to generate a plurality of split beams by splitting the output beam after its reflection by the aspherical mirror; and
a camera configured to detect the plurality of split beams to obtain at least one of a two-dimensional HSI image and a 3-dimensional hyper-cube image,

wherein the reflection of the output beam by the aspherical mirror is directly reflected to the grating from the aspherical mirror,
wherein the grating provides the plurality of split beams directly to the aspherical mirror, and
wherein the plurality of split beams are reflected by the aspherical mirror to be provided to the camera.