LED pulse emission evaluation system Measures the emission state of each pulse from an LED when operated in pulsed mode. This system also performs time-resolved measurement within one pulse. Recent LEDs offer high energy efficiency and so are increasingly being used for lighting or illumination. Even higher power LEDs are under development. Besides basic DC lighting, these high power illuminating LEDs also operate in pulsed mode using an inverter circuit. The LED pulse emission evaluation system using the Hamamatsu Laser Beam Profiler LEPAS-12 measures and analyzes the optical intensity distribution at the moment of LED pulse emission using an external trigger sync function and exposure time adjustment function. Measurement and evaluation of beam emission pattern by synchronizing with emission timing when LED is operated in pulsed mode. Non-lighting At rise 3D display During lighting 3D display Measurement image 3D display Measurement image Measurement image 50 μs 118 ms (8.5 Hz) Pulse waveform Exposure time 10 μs Exposure time 10 μs Exposure time 10 μs LEPAS-12 Application LED pulse emission evaluation system System configuration ND filter set A7659-01 Objective lens (A7659-03) (Option) ×5 to ×20 Expanding optics A6501-03 Laser Beam Profiler LEPAS-12 Digital camera for measurement C8484-05G02 Timing I/O External trigger connector A 9879 IEEE1394 I/F board LED IEEE1394 cable A11327-04 Base for digital CCD A9968-04 Frequency divider circuit (pulse generator, etc.) LED driver circuit Analysis software PC Hardware protect key Signal cable A3476-03 Trigger signal synchronized with pulsed light Trigger signal sub-divided down to 8 Hz or less Specifications Optics specifications Wavelength range 400 nm to1100 nm ×5 × 10 × 20 1.73 mm × 1.32 mm 867 μm × 660 μm 433 μm × 330 μm Objective lens(1) Measurement field-of-view 0.13 0.3 0.46 22.5 mm 16.5 mm 3.1 mm 1.29 μm max. 0.645 μm max. 0.323 μm max. Incident N. A.(2) Working distance Read resolution (1)Selectable by objective lens (option). (2)An N.A. sufficient for LED intensity distribution is required to accurately measurement. *Please consult us if you need other specifications than shown above. Electrical specifications 8.5 Hz Maximum repetition frequency(3) 10 μs to 1 s Applicable pulse width Trigger signal specifications (4) Amplitude Termination impedance Detection edge TTL level 680 Ω Rising edge >10 μs Trigger pulse width (3)If the LED emission repetition frequency is higher than the maximum repetition frequency of the system, then the frequency must be divided by using a pulse generator, etc. (4)Measurement requires trigger signals synchronized with LED emission timing. *When measuring a self-oscillating LED, electrical trigger signals must be generated from the emission signal. Reducing filter set Optics type Wavelength Transmittance (1) A7659-01 A7659-03 600 nm to 1100 nm 400 nm to 650 nm 1/10, 1/25, 1/50, 1/100, 1/250, 1/500, 1/1000, 1/2500, 1/5000 1/10 000, 1/25 000, 1/50 000, 1/100 000 (1) In terms of transmittance, the A7659-01 shows an approximate transmittance in the wavelength range from 650 nm to 850 nm, and the A7659-03 an approximate transmittance from 460 nm to 650 nm. ★ Product and software package names noted in this documentation are trademarks or registered trademarks of their respective manufacturers. • Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult your local sales representative. • Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications and external appearance are subject to change without notice. © 2012 Hamamatsu Photonics K.K. HAMAMATSU PHOTONICS K.K. www.hamamatsu.com HAMAMATSU PHOTONICS K.K., Systems Division 812 Joko-cho, Higashi-ku, Hamamatsu City, 431-3196, Japan, Telephone: (81)53-431-0124, Fax: (81)53-435-1574, E-mail: [email protected] U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P. O. Box 6910, Bridgewater. N.J. 08807-0910, U.S.A., Telephone: (1)908-231-0960, Fax: (1)908-231-1218 E-mail: [email protected] Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658 E-mail: [email protected] France: Hamamatsu Photonics France S.A.R.L.: 19, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: (33)1 69 53 71 00, Fax: (33)1 69 53 71 10 E-mail: [email protected] United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road Welwyn Garden City Hertfordshire AL7 1BW, United Kingdom, Telephone: 44-(0)1707-294888, Fax: 44(0)1707-325777 E-mail: [email protected] North Europe: Hamamatsu Photonics Norden AB: Thorshamnsgatan 35 SE-164 40 Kista, Sweden, Telephone: (46)8-509-031-00, Fax: (46)8-509-031-01 E-mail: [email protected] Italy: Hamamatsu Photonics Italia: S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39)02-935 81 733, Fax: (39)02-935 81 741 E-mail: [email protected] China: Hamamatsu Photonics (China) Co., Ltd.: 1201 Tower B, Jiaming Center, 27 Dongsanhuan Road North, Chaoyang District, Beijing 100020, China, Telephone: (86)10-6586-6006, Fax: (86)10-6586-2866 E-mail: [email protected] Cat. No. SOCS0006E05 DEC/2012 HPK Created in Japan