Re: Art Duplication
Re: Art Duplication
- Subject: Re: Art Duplication
- From: Gerhard Fuernkranz <email@hidden>
- Date: Tue, 22 Sep 2015 01:03:40 +0200
Am 21.09.2015 um 03:42 schrieb Roger Breton:
Illah,
How do you get uniform illumination with halogen bulbs?
/ Roger
A few basic considerations are:
Make sure that the point sources are far enough away from the captured object, say 10 times object size.
Illuminate symmetrically with multiple lights, at least two ones, say 45° from the left and 45° from the right. This also help to reduce non-uniformity caused by a flatness deficiency of the captured object.
E.g. using two point sources, 45° from the left and 45° from the right, each of them located at a distance of 10 times object size results in a cosine-law-induced non-uniformity of less than 1%.
[ Assuming that an (almost) flat object is being captured. ]
Gerhard
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