Coronagraphs

Vector Apodizing Phase Plate (vAPP)

To be documented.

Classical Lyot

Pupil Masks

Two pupil masks are currently available, in addition to “open” (no mask).

Coronagraph Pupil Masks

fwpupil Position

Description

abs. throughput

design file

file scale [m/pix]

open

No mask, just the telescope pupil. Note: design file includes mask over bump.

100%

magMask.fits.gz

0.0067528

bump-mask

Undersized pupil, oversized central obscuration, oversized spiders, and mask over bump

86.75%

bumpMask.fits.gz

0.0067528

fat-spider

Same as bump-mask, but one extra-oversized spider. Intended for kernel-phase type WFS.

Focal Plane Masks

There are two chrome dots on glass plates. Note: optical densities are estimated from standard chrome.

Small spot: 272 um diameter. fwfpm position: lyotsm

lyotsm characteristics

lambda [um]

spot size [lam/D]

opt. dens.

0.600

3.285

5.0

0.656

3.00

4.75

0.700

2.82

4.56

0.800

2.46

4.11

0.900

2.19

3.67

1.000

1.97

3.22

Large spot: 453 um diameter. fwfpm position: lyotlg

lyotlg characteristics

lambda [um]

spot size [lam/D]

opt. dens.

0.600

5.47

5.0

0.656

5.00

4.75

0.700

4.69

4.56

0.800

4.10

4.11

0.900

3.65

3.67

1.000

3.28

3.22

Lyot Stops

Lyot Stops

fwlyot Position

Description

abs. throughput

design file

file scale [m/pix]

LyotLg1

Lyot Large 1

63.82%

lyotMaskLarge1.fits.gz

0.0067528

LyotLg2

Lyot Large 2

57.32

lyotMaskLarge2.fits.gz

0.0067528

LyotSm

Lyot Small

33.35%

lyotMaskSmall.fits.gz

0.0067528

Phase Apodized Pupil Lyot Coronagraph

To be documented.