What is important to look in OPTOEMITTERS?

Normally, I'd imagine, that the application determines the ordering and other entries showing up not mentioned above.

Is this supposed to be a business/marketing project you get graded on?

Jon

This is an entrepreneur project, no grading... I just try to get a clear idea of the industry although I have no idea in electronics.

I agree that it is really up to the application. But if anyone goes on a web site, what do they rather want to see on the search result?

Thanks.

J>

As noted, it depends on the application, but the soldering temperatures are highly unlikely to be important for an initial search

- note that RoHS compliance may _well_ be, though. Soldering temperatures are **expected** to be compatible with existing technologies (non-RoHS and RoHS are different) and should not need to be displayed on the primary results page.

Most engineers would be looking _first_ at the opto specs, although the package type could easily be _part_ of the search as we may have decided we need a surface mount (or through hole) part in the application.

Cheers

PeteS

You write opto emitters, yet describe opto detectors in the specifications. What did you want it for?

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"optoemitter" is an extremely broad cagegory, covering everything from a campfire to an incandescent bulb to a LED to an excimer laser to a thermonuclear detonation.

Can you be any more specific?

Thanks, Rich

I am sorry for the confusion. Let me repost the attribute & product

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Forward Voltage Forward Current LED Emitting Color Reverse Voltage Terminal Type Viewing Angle Rise Time Fall Time Package/Case Mounting Type

Rich Grise wrote:

Well, that is an emitter and those are emitter specs. Now for what is important . . .

YOUR APPLICATION. That will determine the rise/fall time that is acceptable and viewing angle, color - dependant on sensitivity of the detector, most of the other specs irrrelavant . . . you left out power output which may count for something.

That part looks like it was optomized for surface/subsurface mounting into a hole in a circuit board. 150 milliwatts is about average or a smidgen higher than ordinary epoxy leds. You'd probably pay extra for that case/mounting, so presumably that is important to you. Tiny size, good output power, rise/fall times don't look like anything to brag about.

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I didn't see an attribute for Power Output in the spec sheet. Where to I find the value of Power Output? It just said something like "high power output". Is it all we want to know?

Thanks

default wrote:

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Newsgroups

apertured radiant incidence - is a description of the average radient power output in milliwatts per square centimeter. (IR LEDs aren't specified in millicandellas or other visible quantification)

The techinique averages the light output over a specified area perpendicular to mechanical axis of the lens and a short distance from it. Power is averaged because it isn't necessarily consitant over the whole area - from one emitter to the next.

You'd also want to know the size of the aperture and distance of the measurement - a typical spec might be aperture of 2 mm at a distance of 15 mm. The data sheet you linked to may be part of a data book where the measurement techiques are spelled out in some greater detail

- like the actual schematic for the circuit used to measure rise and fall times.

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last time I made such a purchasing decision it was the following (parenthesis are attributes not from your list)

Mounting Type (output) Package/Case Power Dissipation (price)

I went with a 40W incandescent with a BC mount :)

Bye. Jasen