need optical designer advise
need optical designer advise
(OP)
Looking for expert advise on such idea: how complicated would be to design
monochromatic microscope objective similar to Mitutoyo 100x LWD NUV (original
done for 4 wavelengths), but working only on single single wave length to
make it cheaper. The original costs $7500 and my idea i to use only UV light
(355nm) and UV camera.
The parameters of original is:
Magnification 100X
Infinity corrected
Numerical Aperture NA 0.50
Working Distance (mm) 11.0
Focal Length FL (mm) 2.0
Resolving Power (μm) 0.6
Depth of Focus (μm) 1.1
Field of View, 1/2" Sensor (mm) 0.06 x 0.05
Now original consists of about 30 lenses. How many lenses I could expect if
we go just for single wavelength?
monochromatic microscope objective similar to Mitutoyo 100x LWD NUV (original
done for 4 wavelengths), but working only on single single wave length to
make it cheaper. The original costs $7500 and my idea i to use only UV light
(355nm) and UV camera.
The parameters of original is:
Magnification 100X
Infinity corrected
Numerical Aperture NA 0.50
Working Distance (mm) 11.0
Focal Length FL (mm) 2.0
Resolving Power (μm) 0.6
Depth of Focus (μm) 1.1
Field of View, 1/2" Sensor (mm) 0.06 x 0.05
Now original consists of about 30 lenses. How many lenses I could expect if
we go just for single wavelength?
RE: need optical designer advise
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RE: need optical designer advise
I would really appreciate more input on this subject. Especially from someone who related to optical designs.
RE: need optical designer advise
Harold
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RE: need optical designer advise
Just how many microscope objective designers do you think there are in the world? And what makes you think that you can get to hire one to do your one-off? Just because a ZEMAX or CodeV designer is "experienced" does not mean that they're experienced in microscope objectives, particular a 100x. Moreover, unless that "experienced" ZEMAX designer knows everything there is to know about the rest of a Mitituyo microscope, he'll burn hours just trying to figure out what he even needs to design to mate to the rest of the microscope. What your asking for is not dissimilar to asking for an "experienced" electronics engineer to design an 28-bit ALU that mates into Intel i7 quad-core processor. Is a 28-bit ALU that much simpler than a 32-bit ALU? Do you know enough about an i7 processor to know the timing and interfaces required to get an ALU to work in an Intel processor? Even when I might have been considered a "experienced" designer, I wouldn't have know anything about an Intel 486 internal workings unless I was part of the design team.
I am seriously perturbed by your lack of understanding of AR coatings. You need AR coatings to reduce reflections, regardless of whether it's a single wavelength or a spectrum. Otherwise, you get ghost images up the wahzoo. 4% reflections from every surface is a non trivial problem for imaging. Reducing the bandwidth simply cuts down on the complexity of the AR coat, but does not eliminate it.
There no optical designs that only use a single type of glass. The variety of glass compositions simplify the optical design. Unless you are an experienced lens grinder and polisher, it ain't going to happen in your garage. Most production lens systems run batches of lens in a single run. Running a single 1/2" lens by itself would be absurdly expensive in an actual optical shop. You can buy a $50 moderate quality lens from Hamilton, that's made in batches of 100, or you pay $10,000 to build a one-off.
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