SMT, PCB Electronics Industry News

SMT, PCB Electronics Industry News

News from LDD Trading Associates, LLC

LED Back Lights for Machine Vision at

Aug 04, 2010

The IDHM Back Light Series

The IDHM Back Light Series

The new IDHM Series Direct LED Back Lights from employ high output chip LEDs mounted in a dense array directly below a diffuser, resulting in highly uniform and intense light from a very thin package. With case heights ranging from 11 to 16.5 mm, IDHM backlights require a minimal amount of valuable space in a vision system installation (for applications requiring still thinner packages, see our IFL Series Indirect Back Lights). Though called “Back Lights”, IDHMs are equally effective in front lighting applications requiring diffuse illumination to minimize reflections.

IDHM models are used successfully in imaging applications to provide diffuse, uniform light suitable for silhouetting parts, viewing openings or detecting material presence/absence, thickness or density by projecting light from behind the object. Typical applications include inspection of injection molded parts for short shots, flash and voids; electrical connector pin presence/absence and pitch measurement; checking fill levels in containers at bottling plants; through-hole verification and dimensional measurements in both machining and molding operations.

A member of our Back Light Family, IDHMs are offered in 46 size and wavelength configurations. Available with illuminated area dimensions ranging from 32 to 122 millimeters, IDHM standard models are offered with red, white, blue or green LEDs. Additional wavelengths (IR and RGB) and sizes may be custom ordered.

IDHMs deliver real customer value through their high build quality and competitive pricing. For part numbers and pricing, see the IDHM model page at, or enter “IDHM” into the site’s search box.

About offers an extensive lighting line. Detailed and graphical specifications assist you in choosing lighting techniques. Simple menus guide you through model choices and help you add the right light and accessories to your shopping cart. Enter your account information, select a shipping method, and use the encrypted checkout for fast, secure credit card purchases. Don't want to use a credit card? No problem, just enter your PO number and we'll invoice you. Products are quickly shipped, and backed by a 2 year warranty and “no questions” return policy. is the domain of LDD Trading Associates, LLC.

LDD’s headquarters are at 119B Emerson Road, Milford, NH 03055.

LDD can be reached at, 603-732-0057 or FAX to 603-732-0058.

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