JM20 Pyroelectric Sensor for Photometry

Overview

JM20
Pyro-electric sensors measure pulses up to 2 ms

Applications:
Conversion of a pulse of light into a voltage pulse

FeaturesOur pyro-electric sensors convert a pulse of light into a voltage pulse whose maximum amplitude is directly proportional to the incident energy. They are coated with a black absorber which has an almost constant absorption over a wide wave length range. They reliably measure any pulse up to 2 ms in length with an accuracy of 5%.

Due to their high sensitivity they can be used without additional amplifiers. They should be directly connected to a storage oscilloscope with 1 MOhm or 100 kOhm input impedance. All sensors will be delivered with a calibration factor and a response curve. E.g. reading 3.5 V peak voltage and using a JM10 with a sensitivity of 500 V/J the energy of the incident pulse is 3.5 V/500V/J = 7 mJ.

The models JM10 and JM20 cover almost all applications. Please contact us if you require sensors with other demands. In the figure at the top a JM20 is displayed together with its response curve.

-Maximum pulse length: 2 ms
-Spectral range: 185 nm ...> 25 µm
-Maximum power density: 8 MW/cm² (10 ns pulse)
-Maximum energy density: 150 mJ/cm²
-Average power: 150 mW/cm²
-Accuracy: 5 %
-Specifications:

	JM10	JM20
Energy range	2 µJ ... 75 mJ	15 µJ ... 1.4 J
Typical sensitivity	200 ... 500 V/J at 1 MW 50 ... 200 V/J at 100 kW	20 ... 70 V/J at 1 MW 10 ... 40 V/J at 100 kW
Maximum repetition rate	40 Hz at 1 MW 100 Hz at 100 kW	25 Hz at 1 MW 80 Hz at 100 kW
Diameter of active surface	8 mm	34 mm
Area of active surface	50 mm²	900 mm²
Outer dimensions at front surface	34 mm long and 20 mm diameter	34 mm long and 50 mm diameter