BS04 Beamsplitter

Back to Index of all LIGO COC
This web site is for posting useful documents related to the LIGO Core Optic Components design. The documents are for LIGO internal use only.
GariLynn Billingsley is the moderator of content. Last updated November 21, 2001
Transmission
Side 1 T= 0.505@ 45 degrees /P polarization
Side 2 R=70 ppm at 1053 nm

Absorption
2.51 ± 0.14 ppm/cm

Phase map data (about phase map format and filenames)
CIT Data covers the center 150mm
45DegBS04-180, Dataset has only Tilt subtracted. There are no missing data points within the set.
This data set is taken while viewing the optic at a 45° angle of incidence.
Therefore the x direction is extended by 1.414 and actually covers 212 mm of the BS diameter.
The Y direction covers a 150 mm diameter.
The amplitde of the data also appears higher by 1.414 because of the 45° angle of incidence.
Call Gari if you have questions (X2184)

Z36_BS01-180 Zernike Coefficients for this data set (about Zernike Coeffs, we use the Wyko definitions)
Radius of curvature: See last column at Index
Because of the 45° angle of incidence these Zernike's are fairly meaningless. But I've included them by request.

Physical configuration: See drawings at Index
Nominal: 25cm x 4 cm
Wedge: 1º Installed with the thick side up - this orientation corresponds to the - 180º phase map designated -180

Image of the dataset 45DegBS04-180