Patent ID: 11963760
Assignee: RICOH COMPANY, LTD.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 11:
12. A measuring device comprising:
a total internal reflection prism having a total reflection plane that an object to be measured contacts, the total internal reflection prism having a base material with a refractive index n1;
a light source configured to emit light to make the light having a wavelength equal to or greater than 7 micrometers (μm) and equal to or less than 12 μm incident on the total reflection plane; and
a sensor configured to detect light intensity of the light reflected by the total reflection plane,
the refractive index n1 of the base material of the total internal reflection prism for the light having a wavelength of 10 μm being greater than 1.32 and equal to or smaller than 1.91.