Archive for category photo

Blue LEDs make healthy babies – Firefly Phototherapy from Design That Matters

At an early stage in this project, Pete provided measurements and guidance about the most effective LED optics for the jaundice cure for new born babies. Full project description can be found at the Design That Matters website here. Uniform light with the fewest LEDs, to reduce cost and insure effective treatment.

Project Firefly: Infant Phototherapy. Best use of blue LEDs we can think of.

 

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client action photo

Here’s a couple of our clients puzzling over some lens test data. This was an exciting day, to see this huge lens tested! The puzzling was over by the end of the day, but this is a better action shot.

Perplexed clients puzzled over pixel positioning problems.

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in the future, robots will have arms

the kind of arms to pick up things, not like the puny arms that a T-Rex has. That’s the word we hear from Bec Conrad, who’s taking  a break from her work with animatronic dinosaurs (see this link here: http://www.dinosaurlive.com/funstuff/).

Bec is helping us make this motion stage, based on a salvaged DVD player, a platform for some new precision products. With an encoder capable of 15um resolution from Austria Micro, and controls theory support from Bec, we look forward to using this prototype in our shop to improve our optical measurements.

A few prototype motion stages getting outfit with precision encoders.

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Arduino motor control

We’re using some Arduino  boards for a variety of projects – to run the motion stage (25um resolution), to test LED colors, to run an oven for testing temperature compensation electronics. The add on boards (‘shields’  – since that means something else to me, I have trouble with that name) are a big help. We’ve been using SparkFun as our Arduino parts vendor, and we like ‘em.

Ardumoto 'shield' for the Arduino controls our motion stage prototype. It has capacity to control 2 motors. Photo courtesy Bec Conrad.

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Light uniformity testing

For both a clinical test microscope, and a home theater HDTV projection display, the light from the source must be quite uniform.

To test some non-imaging illumination optics, we set up our digital camera, and wrestled with the RAW data files from the camera. Most cameras have some ability to ‘see’ infra-red, so we can also test the pattern from the remote control output, or for other purposes.

Here we test the light uniformity of an LED source using a digital camera and some Thor Labs mounts.

Here we test the light uniformity of an LED source using a digital camera and some Thor Labs mounts.

These graphs were generated by ImageJ from the RAW data files of the Nikon D1x camera.

These graphs were generated by ImageJ from the RAW data files of the Nikon D1x camera.

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inside an electronic nose

This is a bench test of a prototype electronic nose. Kind of like a wind tunnel test for odors.

The scale is 12 inches long.

Click on the photo for a larger image.alligatoronesideview

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