Re: [photo-3d] Digest Number 286. Mirrors

[Olivier Cahen <o_cahen@xxxxxxxxxxxxxxxx>]

	Good mirrors for any optics should be in glass with a metal layer on
the front face, but such mirrors are very difficult to find and very
expensive.
	I do not recommend you to use a beamsplitter, there are many serious
backdraws with beamsplitters. If the resolution of your camera is poor,
such as most of the digital cameras (all except professional ones, more
than US$5000), the resolution of your half images will be only half. You
would get a huge keystone distortion, with no possibility for
compensation, so that you can never see good images in projection. Only
some types of beamsplitters, with mirrors in different planes making the
image rotating by 90°, can avoid this distortion.
	Stereo images in two subsequent shots can be good...


> Message: 10
>    Date: Sat, 07 Oct 2000 20:00:50 +0200
>    From: andre <dbvs@xxxxxxxxxxxx>
> Subject: Mirror beam splitter device
> 
> I am trying to build a device to take a 3D photo using a digital camera - I
> have seen samples of this used on camcorder where mirrors were used placed
> like a beamsplitter . I do however remember reading that a certain type of
> mirror is needed as not all mirrors will reflect each others image - does
> anybody know about this.
> 
> For those interested I see that www.ddd.com has uploaded there new web site
> and it is pretty neat -
> 
> All help would be appreciated
> 
> Andre