[SML] [CudaMailTagged] Re: Masking Projector Black

[Bryan Manternach]

Higher contrast ratio projectors usually work well with a software mask. But the technology to get a true black is often expensive and not achievable from a small portable projector.   For instance my Sony LCOS Projector  makes a way blacker black than my Sony LCD.  And a 3 Chip DLP usually does a good black because there is no color wheel to leak light etc...

On February 7, 2015 10:18:27 AM PST, Jerry Durand via Stagecraft <stagecraft at theatrical.net> wrote:
>What?  Somebody flash the Jerry sign?
>
>DMX shutters aren't be hard, but that cuts off the entire image.  If
>you're trying to trim the video black border, then that requires a
>gobo.  Haven't seen a lot of projectors with gobo slots, but it
>wouldn't
>be a bad idea for a pro unit to have one.
>
>On 02/07/2015 09:19 AM, Jason Salvatori via Stagecraft wrote:
>>  I've always had issues trying this in the past.  The problem is that
>> in front of the lens you are already past the focal plane, so you
>> can't get a hard cut.  It is akin to using barn doors on a fresnel as
>> opposed to a shutter on an ERS.   Having your blocking material a bit
>> further in front of the lens does help a bit. I've also found that
>> doing this will lower your output intensity of the rest of the image.
>> What we need is someone to invent a projector with internal shutters
>> that are DMX controlled... Jerry?
>>
>> Jason
>>
>>
>>>       I'm curious what can go wrong when trying to mask portions of
>a
>>> projector field with black wrap. I am planning to dowse the
>projector, but
>>> do to its intended use, and necessitated position, large portions of
>the
>>> field will never get used.
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>
>-- 
>Jerry Durand, Durand Interstellar, Inc.  www.interstellar.com
>tel: +1 408 356-3886, USA toll free: 1 866 356-3886
>Skype:  jerrydurand 
>
>
>
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