!file: mods_blue_v7glb
!revised 11/14/00
!revised 1/31/00 position of field lens corrected to agree with red channel
RDM;LEN       "VERSION: 8.50       LENS VERSION: 50       Creation Date: 27-Oct-2000"
TITLE 'MODS bluechannel'
!_______________________________________________________________________________________

!				MODS BLUE SPECTROGRAPH
!_______________________________________________________________________________________
!
!Fused Silica Camera with filter in place. and dichroic substrate in place. Error
!function is dependent on whether dichroic is in or out. 
EPD   8408.0 !diameter of primary mirror NB used diameter is less
DIM   M
WL    642.758576347 565.799121337 488.839666327 412.679255855 336.518845383
REF   3
WTW   0 0 80 0 0
INI   'PLB'
XAN   -0.0333333333333 -0.0166666666667 0.0 0.0166666666667 0.0333333333333 !Field values for a 4 arc-min slit
YAN   0.0 0.0 0.0 0.0 0.0
WTF   1.0 1.0 1.0 1.0 1.0
!These are the vignetting factors for the secondary diameter of 457 mm calculated 
!for a 4 arc-min slit height.
VUY          0.01513       0.01515       0.01515       0.01515       0.01513
VLY          0.01513       0.01515       0.01515       0.01515       0.01513
VUX          0.01618       0.01568       0.01515       0.01459       0.01400
VLX          0.01400       0.01459       0.01515       0.01568       0.01618
!
SO    0.0 0.1e21
S     0.0 10663.69
S     -19200.004 -10663.69 REFL			!Telescope Primary
  CON
  K   -1.0
  CIR OBS 444.5
  CUM 0.0; THM 750.0
S     1974.2416 10663.69 REFL				!Telescope secondary
  STO
  CON
  K   -0.7328021
  CIR EDG 457.1						!size of secondary for f/15 @ focus
  CUM 0.0; THM 300.0
S     -19200.0 3049.33
S     1014.0 0.0						!focal surface
S     500.0 6.0 SILICA_SPECIAL
	GLB G5 						!location for front of field lens
	XDE 0.0; YDE 0.0; ZDE 65.0
	ADE 0.0; BDE 0.0; CDE 0.0
S     521.00 269.0					!rear of field lens

S	0.0 25.0 SILICA_SPECIAL				!dichroic substrate
	GLB G5
	XDE 0.0; YDE 0.0; ZDE 275.0
	ADE 0.0; BDE 35.0; CDE 0.0
S	0.0 0.0						!rear surface of dichroic

S     -6900.0 0.0 REFL					!collimator
	GLB G5
  XDE 0.0; YDE 342.6532; ZDE 3445.77		!Value of zde with dichroic
  ADE 5.70; BDE 0.0; CDE 0.0
  CON
  K   -1.0
  CUM 0.0; THM 100.0
S     0.0 0.0 REFL					!grating
  GRT
  K   0.0; IC Yes
  A   0.0; B 0.0; C 0.0; D 0.0
  GRO 1; GRS 0.00181818181818
  GRX 0.0; GRY 1.0; GRZ 0.0
  GLB G5
  XDE 0.0; YDE -357.5510; ZDE -123.3558
  ADE -17.3; BDE 0.0; CDE 0.0
  CUM 0.0; THM 30.0
S     0.0 0.0						!dummy surface locating camera (S10)
  GLB G5
  XDE 0.0; YDE -653.8413; ZDE 532.8646		!global position w.r.t. slit center
  ADE -24.299999; BDE 0.0; CDE 0.0
!
! __________________________________________________________________________________________

!				MODS BLUE CAMERA SECTION SEQUENTIAL FILE
!___________________________________________________________________________________________
!
! The first surface of each refractive surface is located globally with respect to the surface preceding the camera
! section (S12 above for the blue camera)
! 
S     2105.27833 40.0 SILICA_SPECIAL		!front of corrector lens
	GLB G12
  	XDE 220.0; YDE 0.0; ZDE 0.0
!
S     2406.55412 1147.0876				!rear of corrector lens (aspheric surface)
  ASP
  k  0.0
  A 0.156138556515e-9; B 0.258524237673e-16; C 0.388025729601e-21; D&
   -0.739378606444e-27
!
S     -1525.0 -691.750992 REFL			!camera mirror
	GLB G12
	XDE 6.454; YDE 0.0; ZDE 1172.0825
	ADE 0.0; BDE 8.04; CDE 0.0
	THM 80
!
S	0.0 -6.0 SILICA_SPECIAL				!filter front
	GLB G12
	XDE 220; YDE 0.0; ZDE 495.3366
!
S	0.0 -2						!filter rear
!
S     -244.34593 -25.0 SILICA_SPECIAL		!field flattener front
	GLB G12
	XDE 220; YDE 0.0; ZDE 487.3366
!
S     0.0 -26.8672044					!field flattener rear
S     0.0 0.0
	GLB G12						!focal surface
	XDE 220; YDE 0.0; ZDE 435.469
!
SI    0.0 0.0
ZOO   5
ZOO   WTW W1 0 80 0 0 0
ZOO   WTW W2 0 0 80 0 0
ZOO   WTW W3 80 0 0 0 0
ZOO   WTW W4 0 0 0 80 0
ZOO   WTW W5 0 0 0 0 80
ZOO   REF 3 1 2 4 5
GO