by lobaz » Fri Nov 08, 2019 3:28 pm
Hi, Nana,
as far as I know, there is no simple and affordable way.
You can find someone from the printing industry still operating an imagesetter. It will "print" you a binary opaque (black) pattern on a transparent film. The imagesetters pixels can be approximately 10 um in diameter, maybe a bit lower, but then they start to be quite unreliable. The diffraction angle you can get is very small, say about 2 degrees. It cannot give you a hologram suitable for 3-D observation, but you can test the principles.
You can also use an additional optics, e.g., a lens or a curved mirror, to make the angular extent of the reconstructed light wider. It will also make the image smaller, but there is no problem in "printing" the hologram larger - the films from imagesetters are not expensive, about 5 USD per A4 format.
Hacking a projector is possible, but the pixels you get are 10 um again. You will not get wider diffraction angle than from the imagesetter. You will be limited by the SLM size, say about 1-2 cm diagonal. But you can test your calculations instantly, which is good.
The CD writer you mentioned was done, as far as I know, once. They hacked the firmware of the CD-ROM and it worked just for that model. Once the CD-ROM drive was discontionued, it was gone.
If you have interesting results, you can contact Kyoji Matsushima and his Kan-dai studio CGH printing service. I do not know his pricing, but as it is non-commercial effort, moy may be lucky
By the way, what type of CGH are you going to make?
Petr
Hi, Nana,
as far as I know, there is no simple and affordable way.
You can find someone from the printing industry still operating an imagesetter. It will "print" you a binary opaque (black) pattern on a transparent film. The imagesetters pixels can be approximately 10 um in diameter, maybe a bit lower, but then they start to be quite unreliable. The diffraction angle you can get is very small, say about 2 degrees. It cannot give you a hologram suitable for 3-D observation, but you can test the principles.
You can also use an additional optics, e.g., a lens or a curved mirror, to make the angular extent of the reconstructed light wider. It will also make the image smaller, but there is no problem in "printing" the hologram larger - the films from imagesetters are not expensive, about 5 USD per A4 format.
Hacking a projector is possible, but the pixels you get are 10 um again. You will not get wider diffraction angle than from the imagesetter. You will be limited by the SLM size, say about 1-2 cm diagonal. But you can test your calculations instantly, which is good.
The CD writer you mentioned was done, as far as I know, once. They hacked the firmware of the CD-ROM and it worked just for that model. Once the CD-ROM drive was discontionued, it was gone.
If you have interesting results, you can contact Kyoji Matsushima and his Kan-dai studio CGH printing service. I do not know his pricing, but as it is non-commercial effort, moy may be lucky :)
By the way, what type of CGH are you going to make?
Petr