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What is important to look in OPTOEMITTERS?

Hi, I am doing a school project (not electronic project) and I want to
know how people buy OPTOEMITTERS. Can you tell me the 5 most important
attributes when you buy it? Or if you can, please help me to rank these
attributes below in order.

Model
Soldering Temperature (Iron)
Soldering Temperature (Flow)
Collector Emitter Voltage
Emitter Collector Voltage
Power Dissipation
Peak Sensitivity
Reception Angle
Collector Emitter Dark Current
On-State Collector Current Min
On-State Collector Current Max
Saturation Voltage
Rise Time
Fall Time
Light Current Slope
Knee Point
Package/Case
Mounting Type

Thanks.
 
J

Jonathan Kirwan

Jan 1, 1970
0
Hi, I am doing a school project (not electronic project) and I want to
know how people buy OPTOEMITTERS. Can you tell me the 5 most important
attributes when you buy it? Or if you can, please help me to rank these
attributes below in order.

Model
Soldering Temperature (Iron)
Soldering Temperature (Flow)
Collector Emitter Voltage
Emitter Collector Voltage
Power Dissipation
Peak Sensitivity
Reception Angle
Collector Emitter Dark Current
On-State Collector Current Min
On-State Collector Current Max
Saturation Voltage
Rise Time
Fall Time
Light Current Slope
Knee Point
Package/Case
Mounting Type

Thanks.

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.
 
P

PeteS

Jan 1, 1970
0
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.

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
 
D

default

Jan 1, 1970
0
Hi, I am doing a school project (not electronic project) and I want to
know how people buy OPTOEMITTERS. Can you tell me the 5 most important
attributes when you buy it? Or if you can, please help me to rank these
attributes below in order.

Model
Soldering Temperature (Iron)
Soldering Temperature (Flow)
Collector Emitter Voltage
Emitter Collector Voltage
Power Dissipation
Peak Sensitivity
Reception Angle
Collector Emitter Dark Current
On-State Collector Current Min
On-State Collector Current Max
Saturation Voltage
Rise Time
Fall Time
Light Current Slope
Knee Point
Package/Case
Mounting Type

Thanks.

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

Rich Grise

Jan 1, 1970
0
Hi, I am doing a school project (not electronic project) and I want to
know how people buy OPTOEMITTERS. Can you tell me the 5 most important
attributes when you buy it? Or if you can, please help me to rank these
attributes below in order.

"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
 
D

default

Jan 1, 1970
0
I am sorry for the confusion. Let me repost the attribute & product

http://www.optekinc.com/pdf/OP123.PDF
Infrared LED
------------------

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

default

Jan 1, 1970
0
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?

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.
 
J

jasen

Jan 1, 1970
0
Hi, I am doing a school project (not electronic project) and I want to
know how people buy OPTOEMITTERS. Can you tell me the 5 most important
attributes when you buy it? Or if you can, please help me to rank these
attributes below in order.

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
 
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