Magic Leap House of Cards – FSD, Waveguides, and Focus Planes
1–10 of 60 posts
Re: Magic Leap House of Cards – FSD, Waveguides, and Focus Planes
#2Another post from today, really laying out the math behind hi-res FSD being a bad joke.
http://www.kguttag.com/2018/01/06/magic-leap-fiber-scanning-...
Key point...
Thus the fiber needs go 10.17 meters X 240/sec = 2,400 meters/sec. For reference, the speed of sound is a mere ~343 meters per second (varies with temp and air density) so the fiber has to average about 7 times the speed of sound and because it is accelerating and decelerating back to zero at each end, it has to have a peak velocity of greater than 14 times the speed of sound!!!!!
Re: Magic Leap House of Cards – FSD, Waveguides, and Focus Planes
#3Another post from today, really laying out the math behind hi-res FSD being a bad joke. http://www.kguttag.com/2018/01/06/magic-leap-fiber-scanning-... Key point... Thus the fiber needs go 10.17 meters X 240/sec = 2,400 meters/sec. For reference, the speed of sound is a mere ~343 meters per second (varies with temp and air density) so the fiber has to average about 7 times the speed of sound and because it is acceler…
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Re: Magic Leap House of Cards – FSD, Waveguides, and Focus Planes
#4Also Moore's Law in this context doesn't even seem to make sense, the "Law" deals in transistors, not optical technologies.
Re: Magic Leap House of Cards – FSD, Waveguides, and Focus Planes
#5Another post from today, really laying out the math behind hi-res FSD being a bad joke. http://www.kguttag.com/2018/01/06/magic-leap-fiber-scanning-... Key point... Thus the fiber needs go 10.17 meters X 240/sec = 2,400 meters/sec. For reference, the speed of sound is a mere ~343 meters per second (varies with temp and air density) so the fiber has to average about 7 times the speed of sound and because it is acceler…
I'm definitely a Magic Leap skeptic, but these Karl Guttag posts do not read like posts from someone who is trying to do an objective analysis of the tech, they read like posts from someone who has an axe to grind. Often, when I see posts from very smart and technically savvy people that call things "cons" or "scams" it's because they have very high personal standards of technology and are disappointed that others do not share their views.
Frequently in these situations, it turns out that the mass consumer market is still satisfied with the product, since their expectations of the technology are more modest than those of a tech expert.
I guess only time will tell whether Magic Leap will end up being a "con" or, instead, whether they are able to put in place some crude mitigations for these technical challenges that allows them to still release interesting and usable technology. In the latter case, the technology would likely still have flaws that Karl would find wholly unbearable, but may nevertheless allow for compelling products for ordinary consumers.
Re: Magic Leap House of Cards – FSD, Waveguides, and Focus Planes
#6Also Moore's Law in this context doesn't even seem to make sense, the "Law" deals in transistors, not optical technologies.
Sorry if that was not clear, but what you said was the point I was trying to make.
People today are all the time waving their hands and invoking "Moore's Law" and saying "Steve Job did this" and applying it to everything (I see it all the time in AR and Optics) and therefore anything is possible.
Re: Magic Leap House of Cards – FSD, Waveguides, and Focus Planes
#7Another post from today, really laying out the math behind hi-res FSD being a bad joke. http://www.kguttag.com/2018/01/06/magic-leap-fiber-scanning-... Key point... Thus the fiber needs go 10.17 meters X 240/sec = 2,400 meters/sec. For reference, the speed of sound is a mere ~343 meters per second (varies with temp and air density) so the fiber has to average about 7 times the speed of sound and because it is acceler…
I'm definitely a Magic Leap skeptic, but these Karl Guttag posts do not read like posts from someone who is trying to do an objective analysis of the tech, they read like posts from someone who has an axe to grind. Often, when I see posts from very smart and technically savvy people that call things "cons" or "scams" it's because they have very high personal standards of technology and are disappointed that others do…
Objective is often in the eye of the beholder. I do express opinion, but I try to back them up with evidence.
The Fiber Scanning Display is in a whole different category. This looks like pure lying on Magic Leap's part.
In this particular case I have tried to lay out the math that proves that Fiber Scanning Displays are never going to support high resolution. No amount of money or time is going to make Fiber Scanning Displays work. I picked this case because the math was simple to follow and easy to prove that it was not possible. Yet it has been a key point in Magic Leaps Presentations and patent applications through to the latest ones printed.
I think it is a very valid point to asked how a company could have been presenting something that was not possible, why people invested in a company saying things that were not possible, and why Magic Leap is holding to the fiction that it might be possible.
It seems to me to be a pretty simple question. Were they lying or did they not know what they are doing?
There are other areas of optics and image quality where you can argue about whether the image quality will be "good enough" but Fiber Scanning Displays is a black and white issue.
Re: Magic Leap House of Cards – FSD, Waveguides, and Focus Planes
#8Also Moore's Law in this context doesn't even seem to make sense, the "Law" deals in transistors, not optical technologies.
Sorry if that was not clear, but what you said was the point I was trying to make. People today are all the time waving their hands and invoking "Moore's Law" and saying "Steve Job did this" and applying it to everything (I see it all the time in AR and Optics) and therefore anything is possible.
You mentioned CES prep .. are you presenting or at a booth? Or just packing? :) I went for the first time last year and didn't get to see to much stuff in optics (the big wow for me was seeing Kopin modules). Would love to get your thoughts on what is worth checking out at the show this year.
Re: Magic Leap House of Cards – FSD, Waveguides, and Focus Planes
#9Earlier quoted context omitted.
I'm definitely a Magic Leap skeptic, but these Karl Guttag posts do not read like posts from someone who is trying to do an objective analysis of the tech, they read like posts from someone who has an axe to grind. Often, when I see posts from very smart and technically savvy people that call things "cons" or "scams" it's because they have very high personal standards of technology and are disappointed that others do…
Objective is often in the eye of the beholder. I do express opinion, but I try to back them up with evidence. The Fiber Scanning Display is in a whole different category. This looks like pure lying on Magic Leap's part. In this particular case I have tried to lay out the math that proves that Fiber Scanning Displays are never going to support high resolution. No amount of money or time is going to make Fiber Scanning…
I agree you make great points- Thank you for writing up these posts!
Re: Magic Leap House of Cards – FSD, Waveguides, and Focus Planes
#10I thought Magic Leap had already waived the white flag and decided to become yet another goggle vendor.