Holding structure for optical element
AssigneeKonica Minolta Opto, Inc.
InventorsSatoshi Onishi, Atsushi Matsuura, Shinichi Suzuki
Life of this patent
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Abstract
Pressure spring pieces elastically bias a free-form curved mirror such that the free-form curved mirror is pressed against positioning sections and positioned thereby. Displacement restricting sections are disposed opposite to the pressure spring pieces with respect to the free-form curved mirror in biasing directions of the pressure spring pieces with gaps. The gaps are set such that deformation of the pressure spring pieces remain within an elastic range when the free-form curved mirror moves against biasing forces of the pressure spring pieces to come into contact with the displacement restricting sections.
Claims15
A holding structure for an optical element, comprising:
- an elastic biasing section for elastically biasing an optical element;
- a positioning section disposed opposite to the elastic biasing section with respect to the optical element in a biasing direction of the elastic biasing section, the optical element being pressed against the positioning section by the elastic biasing section so as to be positioned;
- and
- a displacement restricting section disposed opposite to the positioning section with respect to the optical element in the biasing direction and opposed to the optical element in the biasing direction with a gap,
- wherein the gap is set such that deformation of the elastic biasing section remains within an elastic range when the optical element moves against a biasing force of the elastic biasing section to come into contact with the displacement restricting section.
A projection unit, comprising:
- a projection optical system for projecting an image light from an image forming element, including at least one optical element having optical power;
- and
- a holding structure for elastically holding the optical element,
- wherein the holding structure comprises:
- an elastic biasing section for elastically biasing the optical element;
- a positioning section disposed opposite to the elastic biasing section with respect to the optical element in a biasing direction of the elastic biasing section, the optical element being pressed against the positioning section by the elastic biasing section so as to be positioned;
- and
- a displacement restricting section disposed opposite to the positioning section with respect to the optical element in the biasing direction and opposed to the optical element in the biasing direction with a gap,
- wherein the gap is set such that deformation of the elastic biasing section remains within an elastic range when the optical element moves against a biasing force of the elastic biasing section to come into contact with the displacement restricting section.
Dependencies are inferred from the claim text.