Alta U77 Specifications   Printer friendly PDF Alta U77 Specifications The Alta U77 has a midband or broadband back-illuminated full frame sensor with very high quantum efficiency and excellent dynamic range. Low noise and large field-of-view are ideal for spectroscopy and star tracking. 512 x 512 array, 24 x 24 micron pixels 2 MHz 12-bit and 700 kHz 16-bit digitization 32 Mbyte camera memory Fast focus mode: multiple subframes per second USB 2.0 interface: no plug in cards or external controllers Programmable, intelligent cooling to 50C below ambient Binning up to 10 Horizontal x 512 Vertical Subarray readout and fast sequencing modes Precision time delayed integration readout Programmable fan speed for low / zero vibration Two serial port outputs for control of peripheral devices General purpose programmable I/O port External triggering and strobe controls ActiveX drivers and MaxIm DL/CCD software included with every system Field upgradeable firmware Fused silica windows Runs from single 12V supply with input voltage monitor Compact enclosure Programmable status indicators MaxIm DL/CCD and CCDSoft software packages are offered at special prices when purchased at the same time as a camera system. CCD Specifications CCD CCD77-00 Array Size (pixels) 512 x 512 Pixel size 24 x 24 microns Imaging area 12.3 x 12.3 mm (151.3 mm2) Imaging diagonal 17.38 mm Linear Full Well (typ.) 350,000 e- Dynamic Range >99 dB Camera System Performance PC Interface USB 2.0 Max. Cable length 5 meters between hubs; 5 hubs maximum (max. total of 30m) Digital resolution 12 bits at 2 MHz and 16 bits at 700 kHz System Noise (typ.) 2 counts at 2 MHz; 10 e- RMS at 700 kHz Pixel Binning 1x1 to 10x1024 on-chip Exposure Time 20 milliseconds to 183 minutes (2.56 microsecond increments) Image Sequencing 1-65535 image sequences under software control Frame Sizes Full frame, subframe, focus mode Cooling Thermoelectric cooler with forced air. Maximum cooling 55° C below ambient temperature Temperature Stability ±0.1° C Dark Current (typ.) <0.1 e-/pixel/sec (-35° C) Camera Head Standard: D2; Low profile: D6. Aluminum, hard blue and black anodized. 6" x 6" x 2.5" (15 x 15 x 6.35 cm). Weight: 3.1 lb. (1.4 kg) Mounting 3.5" bolt circle, 8-32 thread. 2” 24 threads per inch. Optional Nikon or Canon lens mount. Back focal distance Standard: 1.024” (2.60 cm); Low profile: 0.459” (1.17 cm). [optical] Operating Environment Temperature: -22° to 27°C. Relative humidity: 10 to 90% noncondensing Cable length Standard: 15 ft. (4.5m) Power 40W maximum power with shutter open and cooling maximum. Power supplied by AC/DC “brick” supply with international AC input plug. Alternate 12V input for user’s source. Shutter Standard: Melles Griot 43 mm. Low profile: no shutter. Remote Triggering LVTTL input to camera allows exposure start within 25 microseconds of rising edge of trigger. CCD Sensitivity