Light emitting device
AssigneeNichia Corporation
InventorsSoichiro Miura, Tatsuya Kanazawa
Life of this patent
Estimating the term…
Abstract
A light emitting device includes a base, a first semiconductor laser element, a second semiconductor laser element, a lens member, and a waveplate. The base has a bottom part. The first semiconductor laser element is disposed on the bottom part of the base. The second semiconductor laser element is disposed on the bottom part of the base. The second semiconductor laser element has a different polarization direction from a polarization direction of the first semiconductor laser element. The lens member is a member into which light beams from the first semiconductor element and the second semiconductor laser element enter. The waveplate is configured to change the polarization direction of light from the first semiconductor laser element.
Claims10
A light emitting device comprising:
- a base having a bottom part;
- a first semiconductor laser element disposed on the bottom part of the base;
- a second semiconductor laser element disposed on the bottom part of the base, the second semiconductor laser element having a different polarization direction from a polarization direction of the first semiconductor laser element;
- a lens member into which light beams from the first semiconductor element and the second semiconductor laser element enter, the lens member having a lower surface joined with the base and a lens surface, the lens surface being positioned so as not to protrude toward the bottom part of the base beyond the lower surface;
- and
- a waveplate configured to change the polarization direction of light from the first semiconductor laser element, wherein
- the base has a frame part forming a lateral surface surrounding the first semiconductor laser element and the second semiconductor laser element,
- the base supports the lens member and the waveplate,
- the lens member has a first lens part, a second lens part and a non-lens part, each of the first lens part and the second lens part having a lens shape and respectively corresponding to the first semiconductor laser element and the second semiconductor laser element,
- the non-lens part defines a recess, and the first lens part and the second lens part are disposed in the recess of the non-lens part, and
- a lower surface of the waveplate is positioned on a surface of the lens member on a side where the recess is defined.
A light emitting device comprising:
- a base having a bottom part;
- a first semiconductor laser element disposed on the bottom part of the base;
- a second semiconductor laser element disposed on the bottom part of the base, the second semiconductor laser element having a different polarization direction from a polarization direction of the first semiconductor laser element
- a lens member into which light beams from the first semiconductor element and the second semiconductor laser element enter, the lens member having a lower surface joined with the base and a lens surface, the lens surface being positioned so as not to protrude toward the bottom part of the base beyond the lower surface;
- and
- a waveplate configured to change the polarization direction of light from the first semiconductor laser element, wherein
- the base has a frame part forming a lateral surface surrounding the first semiconductor laser element and the second semiconductor laser element,
- the base supports the lens member and the waveplate,
- the lens member has a first lens part, a second lens part and a non-lens part, each of the first lens part and the second lens part having a lens shape and respectively corresponding to the first semiconductor laser element and the second semiconductor laser element,
- the non-lens part defines a recess, and the first lens part and the second lens part are disposed in the recess of the non-lens part, and
- the waveplate has a first bonding portion which is bonded to an upper surface of the non-lens part on a side where the recess is defined, a non-bonding portion extending from the bonding portion toward the first lens part, and a second bonding portion which is bonded to the upper surface of the non-lens part on the other side of the non-bonding portion.
Dependencies are inferred from the claim text.