Title:
OSCILLATING MIRROR ELEMENT AND RANGING DEVICE
Document Type and Number:
Japanese Patent JP2015022206
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide; an oscillating mirror element capable of keeping rotating angular velocity of a mirror section substantially constant over a roughly entire period of a swing cycle of the mirror section; and a ranging device which allows for simplifying a configuration of a light irradiation unit.SOLUTION: An oscillating mirror element 200 includes; a mirror 11 capable of swinging about an axis 300; resonance drive sections 14a, 14b for driving the mirror 11 to swing about the axis 300 at a resonant frequency; correction drive sections 40, 50 for correcting swing drive of the mirror 11 to non-resonantly drive the mirror 11; and a drive control section 61d configured to control the drive of the correction drive sections 40, 50 to drive the mirror 11 to swing about the axis 300 at a non-resonant frequency in a direction opposite a direction in which the resonance drive sections 14a, 14b drive the mirror 11 to swing, thereby keeping rotating angular velocity of the mirror 11 substantially constant.
Inventors:
MURAYAMA MANABU
Application Number:
JP2013151471A
Publication Date:
February 02, 2015
Filing Date:
July 22, 2013
Export Citation:
Assignee:
FUNAI ELECTRIC CO
International Classes:
G02B26/10; G01C3/06; G01S17/10
Attorney, Agent or Firm:
Hirokazu Miyazono
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