crwdns2933803:012crwdne2933803:0
crwdns2933797:0Karl Guttagcrwdnd2933797:0crwdne2933797:0
crwdns2936043:0crwdne2936043:0 crwdns2933505:0crwdne2933505:0 Jeff Suovanen
- crwdns2933769:0crwdne2933769:0
- crwdns2933771:0crwdne2933771:0
- crwdns2933801:0crwdne2933801:0
crwdns2933807:0crwdne2933807:0
| [* black] The carefully shaped metal slab supporting all the AR hardware is a surprisingly heavy element for an HMD. This sits right over the bridge of your nose after all—the [guide|106064|VR|new_window=true] [guide|60612|headsets|new_window=true] we've taken apart all used lightweight plastic. | |
| [* black] One benefit of this relatively thick metal chassis, is that it makes a great heatsink. The electronics and IR illumination (probably VCSEL devices) produce heat, which needs to be distributed evenly so the user doesn’t feel hotspots on their face. | |
| [* black] Perhaps more importantly, it keeps the wave guides and cameras dimensionally stable over the life of the device. It’s likely the glasses go through an intensive factory calibration process to trim out any optical misalignments that could cause eye discomfort or camera tracking problems. | |
| + | [* icon_caution] KG - I'm not sure about this statement. I don't think you would want the metal frame rigidly connected to the glass. The different coefficients of expansion would cause strain that would affect the optics. |
| + | [* icon_caution] KG- I would have really liked to seen a breakdown of all the layers. It is hard to tell even in the original images what is on what layer. It would have been nice to have a more edge-on shot of the waveguide. |
| [* icon_note] This metal frame may also be partly responsible for the awkward position of the [guide|112245|magnetic tracking sensor|stepid=214858|new_window=true]. To track properly, the sensor has to be clear of all metal and EM sources, with no conductive obstructions between it and the controller. | |
| [* black] Next we carefully relieve the frame of its left and right sensor arrays, as well as what is most likely an IR emitter, and open those up for a closer look. |