by Din » Tue Jun 09, 2015 2:10 pm
Petr,
Thanks for the curves.
Actually, I have no choice because the material does not record below 476. Normally, for colour work, I use 633, 532 and 456. All I can do is ask the client to carefully choose the leds for reconstruction.
It's often difficult to say to a client that I need exact specs, and that if they want "red" or "green" it's simply not enough information. I need a spec that I can check against a spectrophotometer. I often say that making HOEs is not the same as making display holograms, the criteria for HOEs is a mixture of holographic talents, optical engineering skills and mathematical modelling. You simply cannot just throw photons at a plate. Then a friend of mine showed me a piece from LinkedIn that said exactly the same. That is, the talents required to produce a HOE are a combination of holographer, optical engineer and physicist and a lot of HOEs fail because the engineer/scientist does not understand holography and the holographer does not understand engineering. My friend also sent a note saying, "Looks like you're vindicated!"
I think it's going to be an issue with these so-called "smart glasses". The criteria of interest in these applications is the MTF, not the optical efficiency a la Kogelnik. In this case, the MTF has a non-linear relationship to the Seidel aberrations.
Petr,
Thanks for the curves.
Actually, I have no choice because the material does not record below 476. Normally, for colour work, I use 633, 532 and 456. All I can do is ask the client to carefully choose the leds for reconstruction.
It's often difficult to say to a client that I need exact specs, and that if they want "red" or "green" it's simply not enough information. I need a spec that I can check against a spectrophotometer. I often say that making HOEs is not the same as making display holograms, the criteria for HOEs is a mixture of holographic talents, optical engineering skills and mathematical modelling. You simply cannot just throw photons at a plate. Then a friend of mine showed me a piece from LinkedIn that said exactly the same. That is, the talents required to produce a HOE are a combination of holographer, optical engineer and physicist and a lot of HOEs fail because the engineer/scientist does not understand holography and the holographer does not understand engineering. My friend also sent a note saying, "Looks like you're vindicated!"
I think it's going to be an issue with these so-called "smart glasses". The criteria of interest in these applications is the MTF, not the optical efficiency a la Kogelnik. In this case, the MTF has a non-linear relationship to the Seidel aberrations.