Adjustable laser illumination pattern
A laser illuminator emitting a circular profile of substantially uniform intensity is presented. The laser illuminator may include a heat sink configured to optically couple to a laser light source. The heat sink may include a beam dump cavity configured to absorb light from the laser light source, and a circularizer aperture having a cylindrical, flat-top opening and being configured to shape a portion of laser light emitted from the laser light source to exit the heat sink. The laser illuminator may also include a collimation lens configured to collect the light exited from the heat sink and provide a focused beam of light, and a scatter clean-up aperture optically coupled to the collimation lens. The scatter clean-up aperture may be configured to absorb scatter laser light rays, and provide from the focused beam of light an output beam of light comprising a circular profile of substantially uniform intensity.
1. A laser illuminator comprising:
a heat sink configured to optically couple to a laser light source, the heat sink comprising:
a beam dump cavity configured to absorb light from the laser light source; and
a circularizer aperture comprising a cylindrical, flat-top opening, the circularizer aperture configured to shape a portion of laser light emitted from the laser light source to exit the heat sink having a circular profile defined by the cylindrical, flat-top opening;
a collimation lens configured to collect the laser light exited from the heat sink and provide from the collected light a focused beam of light; and
a scatter clean-up aperture optically coupled to the collimation lens, the scatter clean-up aperture configured to:
absorb scatter laser light rays scattered from the focused beam of light; and
provide from the focused beam of light an output beam of light comprising a circular profile of substantially uniform intensity.
2. The laser illuminator of claim 1 , wherein the heat sink is further configured to produce a beam profile of substantially uniform intensity.
3. The laser illuminator of claim 1 , wherein the circularizer aperture is optically aligned with a center axis of the laser light source.
4. The laser illuminator of claim 1 , wherein the collimation lens is optically aligned with a center axis of the laser light source.
5. The laser illuminator of claim 1 , wherein the collimation lens is adjustable between a first position along a center axis aligned with the laser light source and a second position along the center axis.
6. The laser illuminator of claim 5 , wherein the focused beam of light has a divergence angle of 95 milliradians (mrads) when the collimation lens is positioned at the first position, and the focused beam of light has a divergence angle of 250 mrads when the collimation lens is positioned at the second position.
7. The laser illuminator of claim 6 , wherein the position of the collimation lens is continuously adjustable between the first and second positions.
8. The laser illuminator of claim 1 , further comprising the laser light source.
9. The laser illuminator of claim 8 , wherein the laser light source includes one or more laser diodes.
10. The laser illuminator of claim 9 , wherein the one or more laser diodes is configured to emit laser light comprising a rectangular profile.
11. The laser illuminator of claim 10 , wherein the one or more laser diodes is configured to emit laser light comprising a Gaussian beam profile.
12. The laser illuminator of claim 1 , further comprising a housing in which the laser light source, the heat sink, the collimation lens, and the lens holder are disposed, the housing configured for attachment to a firearm.
13. The laser illuminator of claim 12 , wherein the housing further comprises a laser pointer.
14. The laser illuminator of claim 13 , wherein the laser pointer is configured to provide aiming of a target and simultaneously, the laser illuminator is configured to provide illumination of the target.
15. The laser illuminator of claim 1 , wherein the collimation lens comprises a focal length of 8.91.±0.15 millimeters.
16. A lens holder comprising:
a proximal aperture configured to receive light having a circular, flat-top beam profile from a distal aperture of a heat sink component; and
a collimation lens configured to collect the light received from the heat sink component and provide from the collected light a focused beam of light;
the lens holder defining a distal aperture optically aligned with the collimation lens and configured to emit the focused beam of light having the circular, flat-top beam profile;
wherein the distal aperture is further configured to absorb scatter laser light rays scattered from the focused beam of light.
17. A lens holder comprising:
a proximal aperture configured to receive light having a circular, flat-top beam profile from a distal aperture of a heat sink component; and
a collimation lens configured to collect the light received from the heat sink component and provide from the collected light a focused beam of light;
the lens holder defining a distal aperture optically aligned with the collimation lens and configured to emit the focused beam of light having the circular, flat-top beam profile;
further comprising a chamber positioned between the collimation lens and the distal aperture, the chamber configured to allow at least a portion of the focused beam of light to converge upon reaching the distal aperture.
18. The lens holder of claim 16 , wherein the collimation lens is adjustable between a first position along a center axis aligned with the light received from the heat sink component and a second position along the center axis.
19. The lens holder of claim 17 wherein the collimation lens is adjustable between a first position along a center axis aligned with the light received from the heat sink component and a second position along the center axis.