Optical path change element and optical coupling device
AssigneeKonica Minolta, Inc.
InventorTadao Tateyama
Life of this patent
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Abstract
An optical path change element includes a first facet that receives incidence of light beams outgoing from outgoing portions of a first optical element, a second facet that has a predetermined radius of curvature and is provided with a reflection face to reflect the incident light beams from the first facet, and a third facet causing the light beams reflected on the reflection face to outgo to the incident portions of a second optical element. The second facet has protruded faces spaced from the reflection faces. Virtual planes tangent to the protruded faces are defined. At least one of the virtual planes covers the reflection face without being tangent to the reflection face and being parallel with a tangent plane at an arbitrary point of the reflection face.
Claims20
An optical path change element configured to perform optical coupling between a first optical element including outgoing portions of light beams and a second optical element including incident portions of the light beams, comprising:
- a first facet receiving incidence of the light beams outgoing from the outgoing portions of the first optical element;
- a second facet being configured to have a predetermined radius of curvature and being provided with a reflection face to reflect the incident light beams from the first facet;
- and
- a third facet causing the light beams reflected on the reflection face to outgo to the incident portions of the second optical element,
- the second facet having protruded faces spaced from the reflection faces,
- virtual planes tangent to the protruded faces being defined, at least one of the virtual planes covering the reflection face without being tangent to the reflection face and being parallel with a tangent plane at an arbitrary point of the reflection face.
Dependencies are inferred from the claim text.