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).
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.