Re: arsclist My experience with the ELP Laser Turntable

["George Brock-Nannestad" <pattac@xxxxxxxx>]

Date sent:      	Fri, 08 Jun 2001 11:47:53 -0500
From:           	Joe Salerno <salernoj@xxxxxxxxxx>
Subject:        	Re: arsclist My experience with the ELP Laser 
Turntable
To:             	ARSCLIST@xxxxxxxxxxxxxxxx
Send reply to:  	ARSCLIST@xxxxxxxxxxxxxxxx


Joe Salerno wrote, and I quote:

> Makes me wonder if it would play aluminum discs - thought not black
> they should be p-l-e-n-t-y reflective, perhaps too reflective and
> would require a neutral density lens in front of the optical sensor.

----- Much as I would love to have that happen, seeing the problems 
we have with mechanical replay, it is not likely, because the groove 
was embossed, not cut, and hence it is rounded in profile. This 
creates reflection of parallel light which makes no sense to the 
position sensitive device. However, the idea ought to be tried for the 
replay of mothers created by a suitable cutting stylus.

Best regards,


George
Preservation Tactics