Laser video disc recorders

David E. Cooper cooper at
Fri Dec 9 15:23:23 EST 1994

Richard Gordon (gordonr at cc.UManitoba.CA) wrote:
> Dear Dick,

> We do speed-ups of 15000 - 20000X for differentiation waves on axolotls,
> using ordinary video taping with 8 hr, high quality tapes, a household 4
> head VCR, and digitization with a frame grabber. An advantage is that you
> can retrieve your data with any timing interval necessary, from 1/15 sec
> on up, cheaply, so you needn't miss phenomena occurring at time scales
> other than what you guess as needed a priori, as in ordinary time lapse.
> See: 

> Bjorklund, N.K. & R. Gordon (1994). Surface contraction and expansion 
> waves correlated with differentiation in axolotl embryos. I. Prolegomenon 
> and differentiation during invagination through the blastopore, as shown 
> by the fate map. Computers & Chemistry  18(3), 333-345.

> Best regards, -Dick Gordon[Dec4,94]
> On 30 Nov 1994, Dick Fluck wrote:

> > I am considering buying Sony's LVR-3000N recorder.  If you have experience
> > with this model or other similar recorders, I would like to hear from you.
> > I am currently using a time-lapse VCR to record slow events in fish
> > embryos.
> > 
> > 
> > Richard A. Fluck, Dept. of Biology, Franklin and Marshall College, P.O. Box
> > 3003, Lancaster, PA 17604-3003; voice, (717)291-4152; fax,(717)291-4088;
> > email, R_FLUCK at ACAD.FANDM.EDU
> > 
> > 
> > 
> > 

This is a follow up to Richard Fluck's posting concerning
the Sony LVR3000N Laser Disc Recorder.

I have been the happy user of an LVR3000N for about 3 years.
I make frame by frame visualizations here at Caterpillar and 
the LVR has worked very well and I have had no problems with
the unit.
One thing to keep in mind is that if you have a short animation,
(few frames) the LVR will loop the images continuously since there
is no tape to rewind. I also dump the images to a good 4 head
consumer VCR (Sony SLV-696HF). The VCR records while the LVR loops
so you can watch your event over and over later on.
I use several methods to get images out of my workstation (SGI):
	1: Through a frame buffer/converter (SGI Videocreator).
	2. Through a serial connection direct to the LVR.
Both of these methods have their advantages and disadvantages,
but I have always been able to output images to the LVR.

Hope this helps! :)
David E. Cooper			|May a D11 never roll on your parade!
Caterpillar Inc.		|
Research Deptartment		|Start Engines!... Enable Dozing Profile!...
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	voice 309.698.5992
	fax   309.698.5893

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