PF Photography Thread

Andy Resnick

Thanks!

Topher925

Its kind of mind blowing that man kind is capable of making such things.

dlgoff

...that actually work.

Andy Resnick

I'm still learning how to use microscopes! Typically, when mounting a camera to a microscope, the sensor is presented with a small image size: microscopes were developed with image sizes matched to the retina, and optical designs all evolved with the constraint of a 20mm diameter image size. That's why many microscopy images appear circular- the sensor is larger than the image size. And to add insult to injury, the image quality falls off as the edge of the image is approached, meaning only the very center of the sensor has an image worth keeping.

The ultraphot, along with the aristophot (Leica) and multiphot (Nikon), all basically have a bellows attachment which is used to provide a much larger image size- the ultraphot has an 8" image circle. I'm not able to accurately convey what that looks like- if you have seen a large-format contact print, you will know what I mean. This is the best I can do- this is a snapshot of the display using my lowest magnification lens at the shortest bellows length (corresponding to 0.8x magnification):



A penny just barely fits in the image- I don't understand how that's 0.8x, but whatever... Now, this is the amount of that image I can acquire with a 35mm format sensor (at the same scale):



Again, with my camera I can produce 16" x 20" prints at 300 dpi, or 6 foot wide prints at 80 dpi (computer monitor resolutions)- if I could scan or digitally capture the entire image, I could produce publication-quality prints that are *17 feet* wide, or 60-foot wide prints suitable for the side of a truck, or >600-foot wide prints for roadside signage :)

What I have learned to do is take the ground glass off and stick my camera (w/o lens) into the hole, so I can get images like this (these are full-frame images, downsized):






and a 1:1 crop of an image- this would be the 600-foot long poster :)



What's really excellent is that the objective lenses all happily provide the larger image size- the full 8" images are truly incredible to see.

Andy Resnick

Our best image yet:



This is 1700x magnification, using our 100/1.47 lens. Here's the whole image (downsized)-



The NA is high enough to isolate the plane of focus to a single circuit layer.

Drakkith

Andy are you putting the camera at prime focus in a microscope? I'm not sure if the terminology from astrophotography matches up with normal photography, so I hope that makes sense.

Andy Resnick

Yes, if I understand what you mean- the microscope is the camera lens.

Drakkith

Yes, that makes sense now.
What's that circular display thing with the penny on it?

Andy Resnick

That's the projector viewscreen for the Ultraphot; there's a different screen for use with a 4"x5" filmpack. I put up the viewscreen image to show how I gain an additional 10x magnification from the 'crop factor' of my sensor.

Andre

Todays sunset here in South France

Andre

Emir, the happy lab of my sister and his ball. I posted him also in August I think.

Andy Resnick

[QUOTE=Andre;4110905]Todays sunset here in South France

<snip>
Nice- excellent lighting!

Andy Resnick

A few more images of chips- these are some of the markings present. Most chips have a small area that contains the company logo, the device ID, and various process marks:





and also some markings around the edges, where the chips are diced:



But there are also cryptic things like




and artistic doodles:



I haven't gotten a definitive translation of this- nobody knows exactly what it says (the best guess is 'Wash')



This one is the best (so far)

sourlemon

LOLZ the last one is the best! Thanks for sharing Andy.

dlgoff

I think this one is the most interesting. Markings on the edges.

Andy Resnick

Thanks, guys! Elvis was hiding behind an inductor:



CSR also hates Barney:

Topher925

Who says engineers don't have a sense of humor.