Need optical light barrier sensor

[Thomas Gunnarsrud]

Hello all!

For a new project I'm in need of an optical light barrier sensor which
should meet these criterias:

- Detecting range about 120cm
- Detecting cross section about 2-3cm X 2-3cm (outside of this area there
are nearby moving parts on two sides)
- Due to the above requirement the beam should be fairly concentrated
- Should be encapsulated and easy to mount (screws)
- Should be fairly small
- Should work against a reflector in the other end, thus a combined
transmitter/receiver
- If however you a know a receiver transmitter pair that might suit the task
I'm also interested in knowing

If anyone has any suggestions I would welcome them very much. I have looked
at some Sharp and Honeywell sensors but they're not quite suitable it seems.

Thomas

 

[John Fields]

On Thu, 18 Mar 2004 13:33:54 +0100, "Thomas Gunnarsrud"
<thomas.gunnarsrud@NDSPAMkitron.com> wrote:

Hello all!

For a new project I'm in need of an optical light barrier sensor which
should meet these criterias:

- Detecting range about 120cm
- Detecting cross section about 2-3cm X 2-3cm (outside of this area there
are nearby moving parts on two sides)
- Due to the above requirement the beam should be fairly concentrated
- Should be encapsulated and easy to mount (screws)
- Should be fairly small
- Should work against a reflector in the other end, thus a combined
transmitter/receiver
- If however you a know a receiver transmitter pair that might suit the task
I'm also interested in knowing

If anyone has any suggestions I would welcome them very much. I have looked
at some Sharp and Honeywell sensors but they're not quite suitable it seems.

---
Why not use a laser diode illuminating a phototransistor? Modulate the
laser if you have ambient light problems, and if you can live with the
transmitter and receiver being at opposite ends of the path you can do
away with the mirror. If you can't, then because the beam divergence
will be essentially zero you'll need to make the angle between the
incident beam and the reflected beam about 1.2° if you want the keep the
sensor separation to 1", which will guarantee you a detection cross
section of less than an inch anywhere in the path.

We can build something for you if you like. Email me if you're
interested.

--
John Fields

 

[John Popelish]

Thomas Gunnarsrud wrote:

Hello all!

For a new project I'm in need of an optical light barrier sensor which
should meet these criterias:

- Detecting range about 120cm
- Detecting cross section about 2-3cm X 2-3cm (outside of this area there
are nearby moving parts on two sides)
- Due to the above requirement the beam should be fairly concentrated
- Should be encapsulated and easy to mount (screws)
- Should be fairly small
- Should work against a reflector in the other end, thus a combined
transmitter/receiver
- If however you a know a receiver transmitter pair that might suit the task
I'm also interested in knowing

If anyone has any suggestions I would welcome them very much. I have looked
at some Sharp and Honeywell sensors but they're not quite suitable it seems.

Thomas

Some other brands to look at are Banner, Omron and Automation Direct.

http://www.bannerengineering.com/products/photoelectrics/photoelectrics.html
http://www.omronsensors.com/photosens.htm
http://web1.automationdirect.com/adc/Shopping/Catalog/Sensors_-z-_Encoders/Photoelectric_Sensors

--
John Popelish

 

[GrahamH]

"John Popelish" <jpopelish@rica.net> wrote in message
news:405A2B4F.B9461125@rica.net...

Thomas Gunnarsrud wrote:

Hello all!

For a new project I'm in need of an optical light barrier sensor which
should meet these criterias:

- Detecting range about 120cm
- Detecting cross section about 2-3cm X 2-3cm (outside of this area
there
are nearby moving parts on two sides)
- Due to the above requirement the beam should be fairly concentrated
- Should be encapsulated and easy to mount (screws)
- Should be fairly small
- Should work against a reflector in the other end, thus a combined
transmitter/receiver
- If however you a know a receiver transmitter pair that might suit the
task
I'm also interested in knowing

If anyone has any suggestions I would welcome them very much. I have
looked
at some Sharp and Honeywell sensors but they're not quite suitable it
seems.

Thomas

Some other brands to look at are Banner, Omron and Automation Direct.


http://www.bannerengineering.com/products/photoelectrics/photoelectrics.html
http://www.omronsensors.com/photosens.htm

http://web1.automationdirect.com/adc/Shopping/Catalog/Sensors_-z-_Encoders/Photoelectric_Sensors

--
John Popelish

Also sick & keyence
http://www.sick.de/de/products/categories/industrial/en.html
http://www.keyence.com/

Graham

 

[Paul Mathews]

Some higher performance through beam sensors are available from
Cutler-Hammer Sensors, Sick Optik, Baumer Photoelectrics, and Keyence,
but I'm too lazy to provide you the links.

Paul Mathews


John Popelish <jpopelish@rica.net> wrote in message news:<405A2B4F.B9461125@rica.net>...

Thomas Gunnarsrud wrote:

Hello all!

For a new project I'm in need of an optical light barrier sensor which
should meet these criterias:

- Detecting range about 120cm
- Detecting cross section about 2-3cm X 2-3cm (outside of this area there
are nearby moving parts on two sides)
- Due to the above requirement the beam should be fairly concentrated
- Should be encapsulated and easy to mount (screws)
- Should be fairly small
- Should work against a reflector in the other end, thus a combined
transmitter/receiver
- If however you a know a receiver transmitter pair that might suit the task
I'm also interested in knowing

If anyone has any suggestions I would welcome them very much. I have looked
at some Sharp and Honeywell sensors but they're not quite suitable it seems.

Thomas

Some other brands to look at are Banner, Omron and Automation Direct.

http://www.bannerengineering.com/products/photoelectrics/photoelectrics.html
http://www.omronsensors.com/photosens.htm
http://web1.automationdirect.com/adc/Shopping/Catalog/Sensors_-z-_Encoders/Photoelectric_Sensors