Patent ID: 11859969
Assignee: TOKYO SEIMITSU CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A measurement device comprising:
a probe part including a probe configured to measure a surface of an object to be measured and is attached so as to swing around a swing center according to a shape of the surface of the object to be measured;
a scale configured to measure displacement by swinging of the probe part;
a scale head configured to read a scale mark of the scale; and
an arm part to which the probe part is attached, the arm part being attached so as to swing around the swing center integrally with the probe part, and the scale being attached to the arm part,
wherein, when thermal expansion coefficients of the probe part, the arm part and the scale are α, β and γ respectively, the measurement device satisfies a condition of

(α+γ)−1/2α≤β≤(α+γ)+1/2α.