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Palomar Observatory Optical Designs

Prime Focus

Cass Focus (based on H. Petrie information, c. 1994)

Cass Focus specifications (measured by J. Zolkower, 2016)

  • Minimum 16 inch dia. field at f/15.78;
  • Plate scale: 2.56 arcsec/mm;
  • 17.3 arcmin field;
  • Radius of curvature: R132.5”; The sag would be ~ 0.24” at the edge of field.

Cass Focus (created by Leon Harding, 2012, using original drawings from paper 'vault' with help from P. Gardner)

Topic attachments
ISorted ascending Attachment History Action Size Date Who Comment
PDFpdf 200_M1-M2_Measurement.pdf r1 manage 458.9 K 2011-05-12 - 16:58 JeffZolkower  
Unknown file formatzmx Hale_Cassegrain_150708.zmx r1 manage 35.8 K 2015-07-09 - 03:49 RichardDekany  
Unknown file formatzmx LFC_with_Wynne_Corrector.zmx r1 manage 13.1 K 2012-04-27 - 22:17 RichardDekany  
Unknown file formatzmx WaSP_meniscus_dewar_window_Offner_relay_to_guider.zmx r1 manage 26.8 K 2012-04-27 - 22:47 RichardDekany  
Unknown file formatZMX f_16_to_f_9_optical_setup.ZMX r1 manage 23.7 K 2012-06-28 - 00:55 RichardDekany  
Unknown file formatZMX f_16_to_f_9_optical_setup_with_both_focii.ZMX r1 manage 24.1 K 2012-06-28 - 00:55 RichardDekany  
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Topic revision: r7 - 2016-10-07 - RichardDekany
 
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