Radiant energy – Invisible radiant energy responsive electric signalling – Infrared responsive
Patent
1994-09-13
1996-07-02
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
Infrared responsive
2503418, 250347, G01J 400
Patent
active
055324886
ABSTRACT:
An orientation film evaluating apparatus and a rubbing processing apparatus by which the orientation capability for a liquid crystal orientation film can be measured quantitatively with high sensitivity and accuracy even during an actual production process, and an orientation condition is controlled precisely so as to obtain a stable production condition and to improve productivity and yield therefor. The orientation film evaluating apparatus includes: a unit for radiating infrared light; a polarizing portion which polarizes the infrared at varied angles to an orientation film, and for irradiating the polarized infrared lights to the orientation film; a detection portion which detects infrared light reflected upon the orientation film; and an evaluating portion which obtains a difference of absorbance of infrared light detected by the detection portion with respect to a polarized direction of the orientation film, and which evaluates an orientation capability of the orientation film.
REFERENCES:
patent: 4446719 (1984-05-01), Lambert
patent: 4631408 (1986-12-01), Zelmanovic et al.
patent: 4654529 (1987-03-01), Boulay et al.
patent: 5365067 (1994-11-01), Cole et al.
Hasegawa Rei
Ishibashi Mitsuru
Nomaki Tatsuo
Sasaki Hideyuki
Tanaka Akira
Hannaher Constantine
Kabushiki Kaisha Toshiba
Tyler Virgil O.
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