Wearable devices and wearable assemblies with adjustable positioning for use in an optical measurement system

1. An optical measurement system comprising:

a wearable device comprising:

a support assembly configured to be worn on a body of a user; and

a wearable assembly supported by the support assembly and comprising:

a plurality of light sources configured to emit a plurality of light pulses toward a target within the body of the user; and

a plurality of detectors each configured to receive a set of photons included in a light pulse included in the plurality of light pulses after the set of photons is scattered by the target; and

a position alignment system configured to facilitate positioning of the wearable assembly at a same position on the body of the user during different use sessions of the wearable device;

wherein a position of the wearable assembly on the support assembly is adjustable.

2. The optical measurement system of claim 1 , wherein the wearable device comprises a head-mountable component.

3. The optical measurement system of claim 1 , wherein:

the support assembly comprises a support member; and

the wearable assembly is supported on the support member.

4. The optical measurement system of claim 3 , wherein one or more of a position, a length, or a tension of the support member is adjustable to adjust the position of the wearable assembly on the support assembly.

5. The optical measurement system of claim 3 , wherein a position of the wearable assembly is adjustable on the support member.

6. The optical measurement system of claim 3 , wherein the support member comprises a rail.

7. The optical measurement system of claim 3 , wherein:

the support assembly further comprises a body support portion configured to be supported by the body of the user; and

the support member is adjustably connected to the body support portion.

8. The optical measurement system of claim 1 , further comprising an additional wearable assembly supported by the support assembly,

wherein the support assembly comprises an adjustable connector that connects the wearable assembly with the additional wearable assembly.

9. The optical measurement system of claim 1 , wherein the support assembly comprises position markers to indicate a plurality of different possible positions of the wearable assembly on the support assembly.

10. The optical measurement system of claim 1 , wherein the support assembly includes a locking member configure to lock the wearable assembly at the position on the support assembly.

11. The optical measurement system of claim 1 , further comprising a processing unit.

12. The optical measurement system of claim 11 , wherein the support assembly is further configured to support the processing unit.

13. The optical measurement system of claim 11 , wherein the processing unit is included in the wearable assembly.

14. The optical measurement system of claim 11 , wherein the processing unit is not supported by the support assembly.

15. The optical measurement system of claim 1 , wherein the position alignment system comprises a body engagement member configured to engage with an anatomical feature on the body of the user.

16. The optical measurement system of claim 15 , wherein:

the position alignment system comprises an imaging device configured to capture an image of the body of the user; and

the position alignment system is configured to determine, based on the image of the body of the user, a present position of the wearable assembly on the body of the user.

17. The optical measurement system of claim 16 , wherein the imaging device is included in the wearable device.

18. The optical measurement system of claim 16 , wherein the imaging device is separate from the wearable device and the image of the body the user depicts the support assembly worn on the body of the user.

19. The optical measurement system of claim 15 , wherein the position alignment system is configured to:

acquire, from an additional wearable device worn by the user, information indicating a position of the additional wearable device on the body of the user; and

determine, based on the position of the additional wearable device on the body of the user, a present position of the wearable assembly on the body of the user.

20. The optical measurement system of claim 15 , wherein the position alignment system is configured to determine, based on depth data representative of a depth map of the body of the user and the support assembly worn on the body of the user, a present position of the wearable assembly on the body of the user.

21. The optical measurement system of claim 15 , wherein the position alignment system is configured to determine, based on a detection result of the plurality of detectors, a present position of the wearable assembly on the body of the user.

22. The optical measurement system of claim 15 , wherein the position alignment system is further configured to guide, during a subsequent use session of the wearable device after a prior use session of the wearable device, the user to adjust the position of the wearable assembly so that the wearable assembly is located at the same position on the body of the user during the subsequent use session as during the prior use session.

23. The optical measurement system of claim 1 , further comprising an additional wearable assembly supported by the support assembly,

wherein positions of the wearable assembly and the additional wearable assembly on the support assembly are independently adjustable.

24. The optical measurement system of claim 1 , wherein the wearable assembly comprises a plurality of physically connected wearable modules and each wearable module comprises a light source included in the plurality of light sources and a set of detectors included in the plurality of detectors.