DLP lightcrafter focus distance

Christoph Witte51

Hello TI-Team,

i have a lightcrafter dlp 0.3 module. in my application i need a display width of about 4 cm. Taking the specs from lightcrafter 0.3 this would result in a distance of 6,6 cm. Is there any solution to focus on a distance that small or is there any other product you can recommend for such a purpose?

Thanks a lot.

Best regards,

Christoph

over 10 years ago

0 Clinton Rodgers over 10 years ago

TI__Genius 13235 points

Hi Christoph,

Could you create your patterns in such a way that they only fill the portion of the projected image that you require?

We have a network of design houses (www.ti.com/.../solutions-services.page) which do custom work and create complimentary optics and platforms for our devices. You could contact Keynote Photonics about their LC3000-PRO (http://www.ti.com/devnet/docs/catalog/endequipmentproductfolder.tsp?actionPerformed=productFolder&productId=16140) and see if it will fit your needs.

Thanks,
Clinton

0 Christoph Witte51 over 10 years ago in reply to Clinton Rodgers

Prodigy 20 points

Dear Clinton,

thanks for your help and quick reply! I just found an instruction on how to modify the dlp 4500 Module for 3D-printing http://www.ti.com/lit/zip/tidc573 (projecting on small areas). The optics were just modified by inserting small spacers between lightsource and the optics. Would this be possible for the 0.3 youngoptics module or the 3010 EVM aswell?

Best regards,

Christoph

0 Layne Jenkins over 10 years ago in reply to Christoph Witte51

Intellectual 395 points

Christoph,

On the 0.3 optical engine used in the LightCrafter (and Keynote LC3000) the projection lens is mounted in a way that prevents it from being easily moved far enough forward to focus as closely as you require. Keynote modifies the optical engine housing and replaces the projection lens mounting hardware with a redesigned lens holder which allows variable (and lockable) focus distances as close as 35mm. This short focus option is available for any of the products in our LC3000 projector family. If you only need to modify one or a few TI LightCrafter units it is also something you could try to do yourself--the projection lens is reasonably easily removable. After cutting away the front of the housing you can try gluing the projection lens tabs to the engine housing rails or fashioning a way to mount the lens to the baseplate.

Regards,
Layne

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