have u seen the siver halide film at the same site?
TECHNICAL INFORMATION
ORWO Holographic Film HF 53
"Product Description:
The ORWO Holographic Film HF 53 is a green-sensitive silver-halide recording material for holographic applications.
The film is suitable for transmission holograms and reflection holograms. It is designed to make visual objects, holographic-optical elements, optical gratings and similar. It´s qualities are guarantee for high diffraction-efficiency."
"It´s qualities are guarantee for high diffraction-efficiency"
How do you 'guarantee' such a thing? Do they give you your money back if the efficency is not 'high'?
It's a sort of stupid observation, but sometimes the quirks of market-ese makes me wonder how they get away with it.
Hanz gave me this information about a year ago. He did not seem to be to enthusiastic about the OROW but in a very diplomatic way he did not elude to why.
I just got off the phone with their US representative. Apparently the holographic film is enough in demand world-wide to justify it's existence, but not enough in demand in any one place to keep a stock in the US. He asked me to get in touch with their German office, which I intend to do tommorrow.
Having sent them (filmotec) a mail, I am still waiting for a reply.
I equally contacted another German company that was said to deliver already coated films (on TAC base). The guy told me that due to the lack of demand they had dropped that service. However, he thought Agfa was likely to provide the same service. If Agfa was doing that, chances are high other photo companies would do the same - provided that there is sufficient demand.
I guess such films would not only be interesting for DCG but also for the diffusion method...
Many thanks for your interest in our holographic materials. We must
unfortunately tell you, that we do not produce any redsensitive holographic
material. The development of this material won't be completed before end of the
year 2004.
We produce upon request on 190 µm acetate base orthochromatic material in a low
sensitive version ( HF53, approx. 600 µJ/sq cm for density 1 ). A highly
sensitive version (approx. 150 µJ/sq cm for density 1 ) is in development.
In addition we produce the gelatin film GF40 for application in
Dichromat-Holography.
If you are interested in our orthochromatic material:
a sample of the next batch is available in April 2004.
The price of the material depends on the order quantity.
Enclosed the datasheets of the holographic materials.
TECHNICAL INFORMATION
ORWO Holographic Film GF 40
Product description: The ORWO Holographic Film GF 40 is designed for recording of holograms on chromate sensitised gelatine. The film has a layer of pure photo gelatine. The chromate sensitation has to do by user.
Base: acetate 190 µm.
Emulsion: 6 µm
Spectral response: after sensitation from ultra violet to blue-green
UV-laser, Ar+ -laser or analogous wavelength are usable
_________________________________________________________________________________
Availibility: standard asssortment
rolls:
usable width length
104 cm 10 m
104 cm 30 m
sheets:
50 cm x 60 cm 25 sheets per box
_________________________________________________________________________________
Storage: < 18 °C at (55 ± 10) % relative humidity
Manufacturing: upon request
FILMOTEC GmbH
ChemiePark Bitterfeld Wolfen
Areal A, Röntgenstraße Geb. 415
06766 Wolfen
Tel.: +49 (0) - 3494 - 36 96 80
Fax: +49 (0) - 3494 - 36 96 82
filmotec@filmotec.de
www.filmotec.de
____________________________________________________________________________________ page 1 TI-GF40-III/2004
TECHNICAL INFORMATION
ORWO Holographic Film HF 53
Product description: The ORWO Holographic Film HF 53 is a silver halide recording material with high resolution and low speed for holographic applications.
Base: acetate 190 µm.
Emulsion: 6 µm
Sensitivity: ≈ 600 µJ/cm2 at 535 nm for density 1,0 above fog
Resolving power: > 5000 periods/mm
_________________________________________________________________________________
Availibility: standard asssortment
rolls:
usable width length
104 cm 10 m
104 cm 30 m
sheets:
50 cm x 60 cm 25 sheets per box
_________________________________________________________________________________
Storage: < 18 °C at (55 ± 10) % relative humidity
Manufacturing: upon request
FILMOTEC GmbH
ChemiePark Bitterfeld Wolfen
Areal A, Röntgenstraße Geb. 415
06766 Wolfen
Tel.: +49 (0) - 3494 - 36 96 80
Fax: +49 (0) - 3494 - 36 96 82
filmotec@filmotec.de
www.filmotec.de
____________________________________________________________________________________ page 1 TI-HF53-III/2004
Unfortunately, I get no informations about prices.
I have the technical datas documents in PDF. If you wish get it, send me an email at : j_dufrasne at hotmail dot com
I am somewhat disappointed they coat triacetate films -and not polyester. Having spent quite some on making SHSG on PFG-03 (TAC) film, I am a bit worried that the TAC film base will have a hard time withstanding the hot isopropanol baths...
I always thought that polyester substrates were bad for holographic film because they mess up polarized light. Are there maybe varieties of polyester film base that are non-birefringent (or whatever the term is for polarization-neutral)?
"I always thought that polyester substrates were bad for holographic film because they mess up polarized light."
Yes, that's right. The old Agfa film used to be coated on PET which was highly birefringent. For reflection work that posed some difficulties. Rotating the film axis usually helped to overcome that problem.
Though I have never worked with DuPont material, I gathered they also had a PET film base for their Omnidex material. If I recall correctly, Bob a while ago mentioned how he dealt with that problem (unfortunately, I did not find that threat).
"Are there maybe varieties of polyester film base that are non-birefringent (or whatever the term is for polarization-neutral)?"
I guess it's as simple as the way the plastic is produced. If it is casted, it will not show much birefringence.
Another aspect regarding PET vs. TAC is that polyester shows far better archival properties than triacetate. There is no such thing as the notorious "vinegar syndrome". In addition PET is generally more resistant to chemicals. And by far the most important thing (particularly with regards to stability during exposure): PET absorbs a lot less water than TAC.
