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Auto-focus LED touts high brightness in small package

Posted: 15 Nov 2005 ?? ?Print Version ?Bookmark and Share

Keywords:led? agilent technologies? asmt-fj10?

high-brightness LED

Designed specifically to provide illumination in the automatic focus function of digital still cameras under low-light conditions, and at distances up to 3m, the new high-brightness light-emitting diode (LED) from Agilent Technologies Inc. claims to offer the brightest auto-focus LED with a typical light output of 18 candela (at 20mA).

With dimensions of 4.80(L)-by-4.80(W)mm, the new ASMT-FJ10 also features the industry's smallest package footprint. The die uses aluminum indium gallium phosphate (AlInGaP) material technology to provide high luminous efficiency over a wide range of drive currents, up to a maximum of 50mA.

Previously, cameras used infrared-emitting (IR) LEDs as the light source for auto-focusing under low-light conditions because only IR LEDs provided sufficient light output for the application, explained the company. The use of visible light means that the same auto-focusing sensor is used under both low-light and ordinary conditions, whereas IR requires a separate sensor. Since the orange 612nm LED provides visible illumination, the same device can also be used as a red-eye reduction lamp and serve as an indicator that the camera's self-timer is operating, according to the company.

The Agilent ASMT-FJ10 is a lead-free, surface-mount dome lamp using an optimized untinted, non-diffused lens to provide a high luminous intensity with a narrow 8-degree radiation pattern (half-value angle). When installed in a camera without additional collimating optics these LEDs meet Class 1 eye-safety requirements of IEC/EN 60825-1 (2001) under all conditions of operation and single fault failure. The molded package is compatible with lead-free infrared (IR) soldering processes.

The ASMT-FJ10 is supplied on 16mm tape on 380mm diameter reels. Samples and production quantities are available now. Pricing is 35 cents each in moderate quantities. Delivery is four weeks.

- Gina Roos

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