Comparison with Suprime-Cam
|CCD Make and Model||Hamamatsu S10892-01||Hamamatsu S10892-02|
|Number of CCDs||10||104 + AG 4 + AF 8|
|Pixel||15 micron square (0.2 arc-sec)||15 micron square (0.17 arcsec)|
|Field of View||34 arcmin x 27 arcmin||90 arcmin daiameter|
|Conversion Factor||2.5-3.7 e/ADU||3.0 e/ADU|
|Readout noise||~ 10 e||TBD e|
|Readout time||18 sec||20 sec|
|Full well||150,000 e||150,000 e|
|Number of Filters||10||6|
|Filter Exchange Time||300 s||600 s (900 s while commissioning)|
There are 104 main science CCDs, f CCDs for auto guider and 8 CCDs for auto focus. The gap between pixels on neigboring CCDs are about 1 mm (11 arc-sec). The bottom figures shows the actual CCD arrangement seen from the primary mirror.
Wide Field Corrector
Measured on the actual lens system averaged over six light paths (including on-axis and off-axis up to the edge)
|Wavelength [nm]||Measured [%]||Sepcification [%]|
Measured from coating samples. All lens samples are multiplied(csv). This estimate was too ouf of date.
Updated transmission information is shown below, June 12, 2014. (Data).
Optics DesignDesigned performance (in FWHM) is shown in the figure below; ○ for HSC and □ for Suprime-Cam. Green, red, cyan and black shows g, r, i, z band filter's result, respectively.
Transmission of the standard broad-band filters
Tx measureed at the center of the filter using F/2 beam are shown below. The absolute scale has error especially apparent in NIR.