https://www.patentlyapple.com/patently-apple/2021/10/apple-invents-hmds-with-an-advanced-optical-module-positioning-system-to-assist-in-avoiding-distorted-or-double-vision.html
The key element for the MVIS investor is to be found in Figure 1, #44 light emitting diodes…
I am eyeballing this job posting:
https://wd1.myworkdaysite.com/en-US/recruiting/onto/ONTO_Careers/job/Optical-Systems-Engineer_R-1529
It seems like a more hands-on type of work building stuff in the laboratory and giving feedback about performance. Nothing about design/Zemax.
What do you think about this position? How does it differ from regular Optical Engineer positions, which usually rely on design/Zemax?
Can anyone tell me anything about the most recent keyence system? I have the old one and have been a fan but I’m wanting the new rotary addition and don’t know how others are liking It. Thanks.
Hi everyone,
While looking at the Ka-50's sensor package, I realised that there isn't much of an explanation of its tracking method. I do know that the Ka-50 is capable of locking onto ground targets using its camera despite lacking a radar like the Ka-52 or the Mi-28NM. How does the optical tracking system work, and how reliable is it? Do other helicopters use this kind of tracking as well, or is there more of a shift towards air-to-ground radars like the AH-64D Longbow?
Hi all,
New to this whole audiophile world so I have some basic questions and hoping for some recommendations too.
Previously I was leaning towards a soundbar for my home theatre setup (not through choice but because I didn't want a separate amp/sub and also didn't have the space for one) but I recently learned of powered speakers that do not need an amp/sub and this is mindblowing for me as I've always thought that an amp/sub was needed.
Now that's not the case it's opened up the options for me.
There are plenty of options for powered speakers in this sub which I've found very useful but really the main thing that will guide my decision is understanding a little more about HDMI Arc or Optical for audio output.
My scenarios is as follows:
- All inputs (set top box, consoles, Chromecast etc) are connected to TV via HDMI
- TV has additional Optical, HDMI Arc, HDMI CEC inputs. This is TV in question.
- In an ideal world, I'd like to connect powered speakers to the TV using either of those additional inputs
- BUT....
- I'd also like to be able to control the audio using the standard TV remote too, rather than having to reach for a separate remote (this is more to make is painless and easier to use for other members of the household)
Any guidance, advise and suggestions would be much appreciated. The main requirement is that they MUST be powered bookshelf speakers (separate amp/sub is out of the question), just need to understand which method/solution would achieve the above. Max budget is £400.
I'm just posting out of curiosity, unless this turns out to be something major.
I was just playing BeamNG when it locked up. The indicator lights on the keyboard changed, the audio was repeating BSOD style, and the system was completely unresponsive to any input including trying to switch to a TTY. So I hard reset and looked at journalctl.
This is the last thing in the log before the next boot started. It's obviously /dev/sr0 having issues, but nothing is inserted in the optical drive and I heard no noise from it during the crash.
My system is fully up to day as of yesterday night, and using the latest stable Arch kernel.
Oct 09 14:12:48 arch9020 kernel: sr 2:0:0:0: [sr0] tag#19 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s
Oct 09 14:12:48 arch9020 kernel: sr 2:0:0:0: [sr0] tag#19 Sense Key : Not Ready [current]
Oct 09 14:12:48 arch9020 kernel: sr 2:0:0:0: [sr0] tag#19 Add. Sense: Medium not present - tray closed
Oct 09 14:12:48 arch9020 kernel: sr 2:0:0:0: [sr0] tag#19 CDB: Read(10) 28 00 00 00 00 00 00 00 08 00
Oct 09 14:12:48 arch9020 kernel: blk_update_request: I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x80700 phys_seg 3 prio class 0
Oct 09 14:12:48 arch9020 kernel: sr 2:0:0:0: [sr0] tag#20 unaligned transfer
Oct 09 14:12:48 arch9020 kernel: blk_update_request: I/O error, dev sr0, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Oct 09 14:12:48 arch9020 kernel: Buffer I/O error on dev sr0, logical block 0, async page read
Oct 09 14:12:48 arch9020 kernel: sr 2:0:0:0: [sr0] tag#21 unaligned transfer
Oct 09 14:12:48 arch9020 kernel: blk_update_request: I/O error, dev sr0, sector 1 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Oct 09 14:12:48 arch9020 kernel: Buffer I/O error on dev sr0, logical block 1, async page read
Oct 09 14:12:48 arch9020 kernel: sr 2:0:0:0: [sr0] tag#22 unaligned transfer
Oct 09 14:12:48 arch9020 kernel: blk_update_request: I/O error, dev sr0, sector 2 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Oct 09 14:12:48 arch9020 kernel: Buffer I/O error on dev sr0, logical block 2, async page read
Oct 09 14:12:48 arch9020 kernel: sr 2:0:0:0: [sr0] tag#23 unaligned transfer
Oct 09 14:12:48 arch9020 kernel: blk_update_request: I/O error, dev sr0, sector 3 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Oct 09 14:12:48 arch9020 kernel: Buffer I/O error on dev sr0, logical block 3, async page read
Oct 09 14:12:48 arch9020 kernel:
https://www.patentlyapple.com/patently-apple/2021/10/apple-won-three-more-hmdsmartglasses-patents-today-covering-an-adjustable-optical-system-virtual-controls-and-more.html
Relevant excerpt:
“Projection-based systems may employ retinal projection technology that projects graphical images onto a person's retina.
Projection systems also may be configured to project virtual objects into the physical environment, for example, as a hologram or on a physical surface.”
Is there a way to tell whether the quality of the image I'm seeing through my telescope is the result of the limitations of the scope itself or caused by the eyepiece I'm using? I have got a 4.5 inch/900mm reflector. When I use a 6mm celestron omni for planetary observation the image is nice and sharp. But when I use a 4mm omni the image quality is not that well. With 4mm I will have 225x magnification which is also around the limit of the scope (using diameter in mm times 2 rule). Will a 5mm planetary eyepiece be a good solution or is it just that the 4mm omni is of poor quality. Will the quality of the image improve when using a more expensive 4mm EP? Or is this just the limitation of the scope I am facing?
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