Pupil Plane Apodizers
We are using several different pupil plane apodizer designs for the PIAA lab experiment.
All designs are binary masks with alternating reflective and transparent rings used in transmission.
The apodizers were manufactured by HTA photomask on a 25mm diameter quartz substrate. They are designed for a 5.93mm pupil diameter.
PIAA APLC pupil mask
|
|
Microscope image of the central part of PIAA APLC pupil mask.
|
|
|
Microscope image of Mask type 1. Higher magnification image. Notice the very narrow outer ring.
|
PIAA Mask type 1
Apodizer design by Shinishiro Tanaka.
(1) mask type 1
> pupil diameter = 5.93 mm
> edges of transparent rings (in pupil RADIUS UNITS):
> 0.00000000 0.08348958
> 0.11679042 0.21469287
> 0.24651866 0.34789620
> 0.37252181 0.65867897
> 0.72810570 0.75488137
> 0.86788420 0.87223431
|
|
Microscope image of Mask type 1.
|
|
|
Microscope image of Mask type 1. Higher magnification image. Notice the very narrow outer ring.
|
PIAA Mask type 2
Larger OWA and slightly larger IWA than PIAA mask type 1.
Apodizer design by Shinishiro Tanaka.
(2) mask type 2
> pupil diameter = 5.93 mm
> edges of transparent rings (in pupil RADIUS UNITS):
> 0.00000000 0.12831571
> 0.12966574 0.20136753
> 0.20496762 0.27504438
> 0.28121953 0.34947124
> 0.35757144 0.42482312
> 0.43217330 0.61360284
> 0.64057851 0.67285432
> 0.72330558 0.73965599
> 0.80358259 0.81068277
> 0.87508438 0.87758444
> 0.93293582 0.93393585
> 0.99961249 1.00000000
|
|
Microscope image of Mask type 2.
|
Focal Plane Masks
These masks are used in transmission. The "dark hole" region is transmitted to the science camera: it is a D-shaped opening for mask type 1 and a full annulus for mask type 2. The very central part of the masks (100 micron radius) is opaque. The 100 micron radius to 200 micron radius annulus is reflective, used for the sensing of low order aberrations. The "dark hole" is transmissive and the outer part (>550 micron radius) of the mask is opaque.
These masks were manufactured by HTA photomask on a 25mm diameter quartz substrate.
|
|
Microscope image of focal plane mask type 1.
|
|
|
Microscope image of focal plane mask type 2.
|
