Semiconductor light source module
View Patent ↗The present invention provides a semiconductor light source module including: a semiconductor light source for emitting a light flux with a predefined wavelength; a SHG element for converting an incident light flux entering onto an incident end surface of the SHG element into an outgoing light flux having a different wavelength from the incident light flux; a light converging optical system for converging a light flux emitted from the semiconductor light source onto the incident end surface of the SHG element; a light receiving element for receiving a part of a light flux emitted from the SHG element; and a drive device for driving an optical element in the light converging optical system based on a light flux received by the light receiving element.
1. A semiconductor light source module comprising:
a semiconductor light source for emitting a light flux with a predefined wavelength;
a second harmonic generation element for converting an incident light flux entering onto an incident end surface of the second harmonic generation element into an outgoing light flux having a different wavelength from the incident light flux;
a light converging optical system for converging a light flux emitted from the semiconductor light source onto the incident end surface of the second harmonic generation element, comprising at least one optical element;
a light receiving element for receiving a part of a light flux emitted from the second harmonic generation element; and
a drive device for driving an optical element in the light converging optical system based on a light flux received by the light receiving element,
wherein the drive device drives the optical element in the light converging optical system for moving a position of a beam spot formed by the light converging optical system.
2. The semiconductor light source module of claim 1 ,
wherein the light converging optical system comprises a plurality of optical elements, and
the drive device drives at least one of the plurality of optical elements.
3. The semiconductor light source module of claim 2 ,
wherein the drive device drives one of the plurality of optical elements of the light converging optical system.
4. The semiconductor light source module of claim 2 ,
wherein the drive device drives two or more of the plurality of optical elements of the light converging optical system.
5. The semiconductor light source module of claim 1 ,
wherein the drive device drives an optical element in the light converging optical element in at least one direction perpendicular to an optical axis of the semiconductor light source.
6. The semiconductor light source module of claim 1 ,
wherein the drive device drives an optical element in the light converging optical element in one direction perpendicular to an optical axis of the semiconductor light source.
7. The semiconductor light source module of claim 1 ,
wherein the drive device drives an optical element in the light converging optical element in two directions independently including: a X-axis direction perpendicular to an optical axis of the semiconductor light source; and a Y-axis direction perpendicular to the X-axis direction and the optical axis of the semiconductor light source.
8. The semiconductor light source module of claim 1 ,
wherein the drive device drives an optical element in the light converging optical element in a direction of an optical axis of the semiconductor light source.
9. The semiconductor light source module of claim 1 ,
wherein the drive device comprises:
an electromechanical transducer;
a drive member fixed on one end of the electromechanical transducer; and
a movable member connected to an optical element in the light converging optical element and movably supported on the drive member, and
the electromechanical transducer moves the movable member by repeatedly expanding and contracting at different speeds between an expansion and a contraction.
10. The semiconductor light source module of claim 9 ,
wherein the drive member comprises a rotation inhibitor.
11. The semiconductor light source module of claim 10 ,
wherein the rotation inhibitor is formed of a rectangular cross section of the drive member and the movable member having a shape corresponding to the cross section of the drive member.
12. The semiconductor light source module of claim 1 ,
wherein the drive device stops driving an optical element in the light converging optical system when an amount of a light flux received by the light receiving element exceeds a predefined value.
13. The semiconductor light source module of claim 1 ,
wherein the second harmonic generation element emits the outgoing light flux having a different wavelength from the incident light flux and a light flux having a same wavelength as the incident light flux entering onto the incident end surface of the second harmonic generation element, and
the light receiving element comprises a light receiving section receiving the light flux having the same wavelength as the incident light flux.
14. The semiconductor light source module of claim 1 ,
wherein the light receiving element comprises a light receiving section receiving a light flux emitted from the second harmonic generation element whose wavelength is converted by the second harmonic generation element.