Re: [ATM] oslo edu secondary mirror data input question

[Michael Lindner <mikell@optonline.net>]

David Janello wrote:
> Greetings,
> 
> I'm trying to input specs for a mak-newt design into
> oslo edu and the ray trace stops at the secondary
> mirror and does not reflect back to the image plane.
> 
> Spent a couple of hours going through the docs but
> didn't find any examples on how to set up the
> secondary mirror.
> 
> Was hoping someone on the list would have an example
> for how to do this. I inputted the same design into
> ATMOS with no problem but OSLO seems a bit tricker.

Here's a file. Several things you have to do. Select "Lens" and "Lens 
Drawing Conditions", and change the box "Final dist" to "Draw rays to 
image surface".

Next, get rid of surface 5 - it's not needed.

Next set the thickness of Surface 4 to "Solves" "Axial ray height" "0".

Next set the coordinates on surface 4 to "TLB" "0" (instead of 45, only 
TLA should be tilted to 45 degrees), and set "Tilt and bend" to "Yes".

The result is below.

Clear skies.
-- 
Michael Lindner
http://www.starastronomy.org *** http://home.att.net/~mikel
http://www.atmsite.org *** http://www.atmlist.net

// OSLO 6.1 47857     0 50466
LEN NEW "No name" 20.799 5
EBR  1.0
ANG  0.0000572957795
DES  "OSLO"
UNI  25.4
// SRF 0
AIR
RD   2.65
TH   1.0e+20
AP  9.9999999977e+13
NXT  // SRF 1
GLA N-BK7
RD   -7.529
TH   0.475
AP  2.625
NXT  // SRF 2
AIR
RD   -7.794
TH   18.5
AP  2.8
NXT  // SRF 3
RFH
RD   -42.39
TH   -16.1
AP  3.0
NXT  // SRF 4
RFH
PY   0.0
DT   1
TLA  45.0
BEN
NXT  // SRF 5
AIR
CBK  1
WV 0.58756 0.48613 0.65627
WW 1.0 1.0 1.0
END  5
DLRS 3
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