7 http://www.litron.com.tw
Detetion System
Phtomultiplier Detection
Photodetector Module 190nm to 4.8μm
AP Part #
Code
PMT
Type
● Combines SP photodiode detector (AD4XX :covering a wide
wavelength range with Si, InGaAs, PbS, and PBSe photocells)
, programmable charge integrator, and data conversion in a
compact package.
● Expandible with add-on modules for cooled sensor capability.
● Null function for background noise subtraction.
● Programmable gain ranges.
● Easy to install and use on any SP Monochromator
● The unit contains an internal programmable charge integration
amplifier, a 20-bit A/D converter, and a microprocessor with a
RS232 interface.
Photdiode
Part #
AD421 Si 5.8X5.8 190-1000 25 0.4A/W at 1550nm 20pA
AD427* PbS 3X3 1000-2900 25/-10 5x10^4V/W at 2200nm 0.5 to 2.5MΩ
AD429* PbSe 3X3 1500-4800 25/-10 5x10^2V/W at 4μm 0.3 to 1.5MΩ
AD430 InGaAs 3 dia 800-1700 25/-10 0.95A/W at 1.55μm 15nA
AD431 Si/InGaAs 2.4x2.4 300-1700 25 0.45A/W at 0.94μm 30pA
1 dia 25/-10 0.55A/W at 1.55μm 1nA
Detector
Dark resistance
or currnet
Size
(mm)
Range
(nm)
Sensitivity
Temp
(℃)
● Provides a complete detection system for SP ’s monochromators.
● Easy USB2.0 interface.
● Wide selection of PMT’s
AD311 R928 185 - 900nm;
S-20 (extended)
AD321 R212 185 - 650nm; S5
AD322 R406 400 - 1100nm; S1
AD323 R777 185 - 850nm; S-20
AD324 R636 185 - 930nm;
GaAs (extend)
Wavelength Range
& Spectral Response
Typical Photocathode Spectral
Response Characteristics
*Requires 450 Hz chopper optical signal