Instead of a projector, would an LCD with UV backlight work?

This is the place to discuss various hardware. Topic include:
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- Microcontrollers & RAMPs boards
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- Z-Axis and Tilt assemblies
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phreys
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Instead of a projector, would an LCD with UV backlight work?

Postby phreys » Mon Jul 28, 2014 2:40 am

I saw this video while looking around and researching for my future build, https://www.youtube.com/watch?v=MS1t3tHsx9k
and I was wondering why you "have" to use a projector? Wouldn't an LCD flush mounted to the resin container with UV backlighting work? https://www.youtube.com/watch?v=op00xgiD7sc similar to that process?

Phife
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Joined: Fri Jan 17, 2014 5:24 pm
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Re: Instead of a projector, would an LCD with UV backlight w

Postby Phife » Mon Jul 28, 2014 10:18 am

No, LCD will not pass any UV light, it blocks all light below 400nm.

LCD can be used in 3d printing but with near uv sensitive resin, which most are. I am building an LCD printer with 410nm LED array, a simple backlight will not have enough power, you will lose 90% of the light as is passes through the LCD.

Its also not a simple task to build one of these machines, ive been working on this project for over a year and nearing completion of the first working prototype.


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