High Precision Optical Surface Sensor (HIPOSS-1) - Studies on ultra-precision measuring technology.

High-Precision Angle Measuring Technology and High-Precision Angle Sensor

High-resolution and high-precision angle sensors are expected for nanotechnology control system. The technology for manufacturing high-precision disks, and the measurement evaluation technology through the angle calibration system, and the development of a high-resolution optical angle sensor with high-precision and a self-accuracy calibrating function was achieved. This was accomplished using ...

Limits of ultra-high-precision optical astrometry: Stellar surface structures

Aims. To investigate the astrometric effects of stellar surface structures as a practical limitation to ultra-high-precision astrometry, e.g. in the context of exoplanet searches, and to quantify the expected effects in different regions of the HR-diagram. Methods. Stellar surface structures (spots, plages, granulation, non-radial oscillations) are likely to produce fluctuations in the integrat...

Precision optical displacement sensor based on ultra-thin film photodiode type optical interferometers

The design and fabrication of our compact precision optical displacement sensor (PODS) are based on the newly developed ultra-thin film photodiode with its active layer thinner than a half of the incident light wavelength. In this paper, a detailed description of the principle, design, fabrication process and performance of PODS for application in both smooth and rough surfaces will be given.

Ultra-precision Float Polishing of Optical Materials

A Novel and High-Precision Optical Displacement Sensor

In this paper, theoretical and experimental investigation of a novel compact and high-precision (0.2 nm) optical displacement sensor is presented. The sensor operation is based on optical intensity modulation due to diffraction. A circular disk, including a central transmitter and circumferential receivers (8 and 12 configurations), is considered as high precision displacement sensor. Effects o...