VARIABLE OPTICAL FACE, VARIABLE OPTICAL FACE UNIT, OPTICAL SCANNING SYSTEM AND CONDENSING POINT POSITION-MOVABLE OPTICAL SYSTEM

Japanese Patent JP2973272

B2

PURPOSE: To obtain a movable optical face which is low in driving voltage and high in degree of freedom in deformation by deforming this optical face by a strain inducing layer.
CONSTITUTION: All of a substrate 13, the strain inducing layer 17 and the optical face 14 have a flat plate shape and the optical face 14 has just the function as a mere plane mirror when the voltage is not impressed between both electrodes 16, but a transverse direction strain is generated in the strain inducing layer 17 when the voltage is impressed between both electrodes 16 and, therefore, the substrate 13 is deformed and consequently optical face 14 is deformed. For example, the substrate 13 is, therefore, buckled and curved into an arc surface shape when the shrinking transverse strain is generated in the strain inducing layer 17 or the substrate 13 is bulged and is again curved into an arc surface shape when the elongating transverse strain is generated in the strain inducing layer 17. The optical face 14 acts as a concave mirror to condense the incident collimating light r on the optical face 14 when the optical face 14 retracts to have a concave surface shape in such a manner. Conversely, the optical face 14 acts as a convex mirror to divert the incident collimating light r on the optical face 14 when the optical face 14 is bulged.

SAKATA MINORU
GOTO HIROSHI
UEDA YOSHIHIRO
MORITA YOSHUKI
IKEDA MASAAKI

JP12171594A

November 08, 1999

May 10, 1994

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OMURON KK

G02B26/08; B81B3/00; G02B17/00; G02B26/10; (IPC1-7): G02B26/08; G02B26/10

JP2176701A

Nakano Masafusa

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