National Central University

Industrial Technology Research Institute

Ju-Yi Lee

Hsueh-Ching Shih

Ying-Kai Hsu

You-Jun Lin

Kun-Yi Lin

Shin-Kai Tsai

Hong-Yih Yeh

An-Chi Wei

Szu-Han Huang

The present invention relates to a linear polarization component detection system. The system includes elements of a light source configured to emit a detection beam propagating along an optical path; a linear polarization component to be tested configured in the optical path and providing for the detection beam to pass through and transform into a polarized beam; a wave plate configured in the optical path and providing for the polarized beam to pass through and transform into a polarized interference beam; and a phase retrieval device configured to receive the polarized interference beam and sense a light intensity signal from the polarized interference beam.

Linear polarization component detection system and method

The tactile sensor of the present disclosure is an indirect optical sensor, comprising a frame, a sensing plate, a single beam LED light source, a miniature camera, and a grating plate in the sensing plate and the single light source illuminates the grating plate. Geometric interference fringes caused by the shadows of gratings and gratings, images taken by a miniature camera, through an innovative instantaneous steps phase shifting technique, which eliminates the need for any mechanical phase shifting device to detect the pressure and space. The position is measured and has fast and accurate tactile sensing. The advantage of this method is that directly shooting the moir&#xe9; image while calculating the spatial position, temperature, and pressure. Instantaneous steps phase shifting technique can solve the problems of traditional mechanical stepping, non-instant and complex operation problems.

Tactile sensor applied to a humanoid robots

A SPR measuring device is proposed. The measuring device includes a circularly polarized heterodyne light source that produces a circularly polarized heterodyne light beam, a beam splitting element that splits the circularly polarized heterodyne light beam into a reference beam and a signal beam, a first light sensing unit that receives a reference light intensity of the reference beam, a SPR sensor that receives the signal beam and reflects a reflected signal beam, a second light sensing unit that receives a reflected light intensity of the reflected signal beam and a processing circuit that calculates a phase difference between the reference light intensity and the reflected light intensity. A phase change caused by SPR of an incident light is sensitively represented by the circularly polarized heterodyne light beam. Thus tiny changes in physical quantities of analytes are measured easily.

Surface plasmon resonance measuring device

The apparatus and method for measuring displacement according to the present invention includes a first beam and a second beam. A first reflection structure reflects a first beam to the surface of an object under test; and a second reflection structure reflects a second beam to the surface of the object under test. The reflected first beam and the reflected second beam have an optical path difference. The object under test scatters a scattering beam of gathering the first and second beams. The scattering beam has an interference signal. A photodetector receives the interference signal of the scattering beam. Then an operational unit receives and computes the interference signal for producing a displacement value. By using the first and second reflection structures, the first and second beams split from an incident beam produce an optical path difference. Thereby, the structure of the apparatus for measuring displacement can be simplified. Besides, the displacement or the amplitude of vibration of the object under test can be measured effectively.

Apparatus and method for measuring displacement

This invention relates to a scanning ultrasound detection device using two-wave mixing in photorefractive crystal interferometry. An interferometer with two-wave mixing in photorefractive crystal, and cooperates with a confocal lenses module to perform a scan and inspection of the surface of a target. A rotating unit is used for directing a signal beam for detection to be incident upon different locations of the target. The confocal lens module is used to compensate any changes of reflection path caused by the signal beam having different incident angles. Hence, a reflected signal beam and a reference beam can strike on a photo detector.

Growing community of inventors

Taipei, Taiwan

Ju-Yi Lee