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Re: [ATM] Schott KF4 Optical Blank

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Subject: Re: [ATM] Schott KF4 Optical Blank
From: "Richard F.L.R. Snashall" <rflrs@rcn.com>
Date: Fri, 23 Jul 2004 00:23:59 +0100
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jrlauser@email.arizona.edu wrote:
 > Gang,
 >
 > Through the benevolence of God, or a stroke of fortune, I have just 
acquired
 > several 13.75" x 2.3" Schott KF4 536-514 Optical Glass blanks (in 
great shape).

Just out of idle curiosity (given the rumor about KF3, and the
relative closeness of KF3 and KF4), I checked a mate with
S-FPL51 for both air-spaced:

	http://users.rcn.com/rflrs/d05-14x.len

and oiled:

	http://users.rcn.com/rflrs/d05-13x.len

versions.

The net loss (mostly off-axis) photopicly for the oiled version
is only around 3 percent against the air-spaced version.


 > - Jacob Lauser
 > Tucson, Arizona


-- 

Rick S.

http://users.rcn.com/rflrs


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References:
- [ATM] Schott KF4 Optical Blank
  - From: jrlauser@email.arizona.edu

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