Light operated mechanical actuator

Optical waveguides – Miscellaneous

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G02B 600

Patent

active

052186660

ABSTRACT:
An actuator is comprised of a main body, an inner space filled with an amount of thermally expansive gas and having a first portion in the form of a shallow configuration with an opening oriented toward one side of the main body, a second portion and a bottleneck passage located therebetween, a membrane in the form of a thin film connected to the side of the main body for closing the opening of the first portion of the inner space, a substance for converting the light into heat, and a guide device for guiding light into the second portion of the inner space. Upon an unexpected application of an external force on the thin film, the deformation of the thin film is limited at minimum by being supported by the bottom surface of the first portion. This ensures the prevention of the breakage of the thin film.

REFERENCES:
patent: 3847547 (1974-11-01), Delgendre et al.
patent: 4065593 (1977-12-01), Peterson
patent: 4259543 (1981-03-01), Proud et al.
patent: 4758695 (1988-07-01), Sanford et al.
patent: 4821997 (1989-04-01), Zdeblick
patent: 4940896 (1990-07-01), Hagins et al.
patent: 4943032 (1990-07-01), Zdeblick
A resume announcing a conference of the Japan Society of Robot, held Sep. 20-22, 1988, pp. 275-276.
Journal of Japan Society of Robot, vol. 5, No. 2, pp. 3-17, published Apr. 1987 (the last page being an English abstract).

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