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1. (WO2019043453) TORSION SPRING SPECKLE DIFFUSER
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CLAIMS

What is claimed is:

1. A speckle diffuser apparatus to be employed in an optical system, the apparatus comprising: a torsion spring;

an interaction element coupled with a first end of the torsion spring; and

a speckle diffuser element coupled with a second end of the torsion spring.

2. The speckle diffuser apparatus of claim 1, wherein the speckle diffuser element is coupled to a diffuser frame, and a portion of the diffuser frame is coupled with the second end of the torsion spring.

3. The speckle diffuser apparatus of claim 2, further comprising: an actuator configured to interact with the interaction element to cause actuation of the torsion spring.

4. The speckle diffuser apparatus of claim 3, wherein the interaction element is a permanent magnet, and the actuator is an electromagnet.

5. The speckle diffuser apparatus of claim 3, wherein the first end and/or the interaction element is to limit movement of the speckle diffuser element in at least one direction and the second end is to limit movement of the speckle diffuser element in at least one other direction.

6. The speckle diffuser apparatus of claim 2, wherein the diffuser frame comprises a slot configured to receive a tip of the second end of the torsion spring, wherein the diffuser frame is coupled with the second end by way of the tip being inserted into the slot.

7. The speckle diffuser apparatus of any one of claims 1-6, wherein the first end is positioned perpendicular to the second end, or the first end is not positioned perpendicular to the second end.

8. The speckle diffuser apparatus of any one of claims 2-6, further comprising:

a housing to hold the torsion spring, the speckle diffuser element, and the actuator, wherein the actuator is attached to, or embedded in, the housing.

9. The speckle diffuser apparatus of claim 8, wherein the housing comprises a cylinder, wherein at least a portion of the torsion spring is wrapped around the cylinder such that the cylinder acts as an axis of rotation for first end and the second end of the torsion spring.

10. The speckle diffuser apparatus of claim 8, wherein the housing comprises one or more rails along which the speckle diffuser element is to move during oscillation of the speckle diffuser element.

11. A method for operating a speckle diffuser apparatus, wherein speckle diffuser apparatus comprises a torsion spring, an actuator, an interaction element coupled with a first end of the torsion spring, and a speckle diffuser element coupled with a second end of the torsion spring, the method comprising:

activating the actuator to cause the interaction element to move toward the actuator; and deactivating the actuator to cause the interaction element to move away from the actuator during a second actuation phase, wherein deactivation of the actuator is to cause the torsion spring to oscillate such that the speckle diffuser diffuses speckle created by scattering of light.

12. The method of claim 11, wherein the interaction element comprises a permanent magnet and the actuator comprises an electromagnet.

13. The method of claim 12, wherein activating the actuator comprises supplying current to the electromagnet to produce a magnetic field that pulls the permanent magnet toward the actuator during a first actuation phase.

14. The method of claim 13, wherein deactivating the actuator comprises: restricting the supply of current to decrease the magnetic field to release the permanent magnet.

15. The method of claim 14, wherein release of the permanent magnet is to cause the diffuser element to move laterally in proportion to an oscillation frequency of the torsion spring and/or the first end.

16. An optical system, comprising:

a light emitting source to generate light based on one or more digital images;

an optical element to which the generated light is to be redirected; and

a speckle diffuser subassembly disposed between the light emitting source and the optical element, the speckle diffuser subassembly comprising:

an electromagnet,

a permanent magnet attached to a first end of a torsion spring, the permanent magnet to interact with the electromagnet to cause movement of the torsion spring, and a speckle diffusing element coupled with a second end of the torsion spring, wherein the generated light is to pass through the speckle diffusing element and diffuse speckle produced by a scattering of the generated light.

17. The optical system of claim 16, wherein:

the speckle diffusing element is coupled with a frame, wherein the frame comprises a slot configured to receive a tip of the second end of the torsion spring, and the frame is coupled with the second end by way of the tip being inserted into the slot, and

the permanent magnet is to limit movement of the speckle diffusing element in at least one direction and the second end is to limit movement of the speckle diffusing element in at least one other direction.

18. The optical system of claim 17, further comprising:

a controller to control a supply of current to the electromagnet, wherein the controller is to: supply an amount of current to the electromagnet to produce a magnetic field that pulls the permanent magnet toward the electromagnet during a first actuation phase, and restrict the amount of current supplied to the electromagnet to cause the permanent magnet to be released from the electromagnet during a second actuation phase.

19. The optical system of any one of claims 16-18, further comprising:

a holding structure to hold the torsion spring, the speckle diffusing element, and the electromagnet, wherein the electromagnet is coupled to the holding structure or embedded in the holding structure, and the holding structure comprises one or more rails along which the speckle diffusing element is to move during oscillation of the speckle diffusing element.

20. The optical system of claim 19, wherein the holding structure comprises a cylinder, wherein at least a portion of the torsion spring is wrapped around the cylinder such that the cylinder acts as an axis of rotation for first end and the second end of the torsion spring.

21. A speckle diffusion subassembly, comprising:

movement means;

actuation means;

interaction means attached to a first portion of the movement means; and

speckle diffusion means attached to a second portion of the movement means, wherein: the interaction means is for interacting with the actuation means,

the actuation means is for actuating the interaction between the interaction means and the actuation means,

the movement means is for causing movement of the speckle diffusion means in response to the interaction between the interaction means and the actuation means, and the speckle diffusion means is for diffusing speckle produced by scattering of generated light as the generated light passes through the speckle diffusion means.

22. The speckle diffusion subassembly of claim 21, wherein the interaction means is for limiting movement of the speckle diffusion means in at least one direction and the second portion is for limiting movement of the speckle diffusion means in at least one other direction.

23. The speckle diffusion subassembly of claim 22, further comprising:

control means for controlling the actuation means during a first actuation phase and a second actuation phase.

24. The speckle diffusion subassembly of claim 23, wherein the control means is for:

controlling, during the first actuation phase, the actuation means such that the interaction comprises pulling the interaction element towards the actuation means; and

controlling, during the second actuation phase, the actuation means such that the interaction comprises releasing the interaction means or pushing the interaction means away from the actuation means.

25. An optical system, comprising:

light generation means for generating light based on one or more digital images;

display means for displaying the one or more digital images based on the generated light directed to the display means; and

the speckle diffusion subassembly of any one of claims 21-24, wherein the speckle diffusion subassembly is disposed between the light emitting source and the display means.