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How can I find out what type of lens I have?

How can I find out what type of lens I have?

How can I find out what type of lens I have?

(OP)

How can I tell which lens I have in an older laser? The manual states that the laser came with a 2.5 and 3.75 lens, but it has instructions on how to dismantle and re-mount a 5" lens as well. So how do I know which one is actually in the machine?

The answer is probably just as obvious as I think it is, but I want to be very very sure.

Thank you for your help!

RE: How can I find out what type of lens I have?

Unless the part number is etched or engraved in the lens housing itself there is no way of knowing.  Usually there is a  focal length description on those black anodized housings.

However, if you look at the box where the lens came from, it should tell you everything there is to know about it.  In your case, and I assume you are the same guy who has the LC1212, your machine came standard with 5.0" Lenses.  You have an adapter for a 3.75" and a 7.5" also.

Regards,

RE: How can I find out what type of lens I have?

(OP)
Unfortunately I don't have a box for the lens, nor a LC1212. It's a Mazak Turbo-46. All I have is the lens itself. Is there any other way to tell?

RE: How can I find out what type of lens I have?

I guess at this point it would be trial and error.  What is the wattage on the machine?  If it's less than a 2.0 Kw laser it's likely they only provide 5.0" Focal Length.  Call Mazak applications group and see if you can get a hold of them.

RE: How can I find out what type of lens I have?

Since the lens is removable, you could simply try to image a ceiling light onto a sheet of paper with the lens.  The distance from the paper should be close to the focal length.

TTFN

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