`EXHIBIT 2108
`
`
`
`
`
`Comments on PBS Feasibility Study.
`
`Matt Cowan
`June 20, 2006
`
`Size:
`
`The lens final glass element has a size varying from about 90mm to about 130mm. These
`elements carry a rectangular patch of ratio 1.85:1 to 2.35:1. As such there is an
`opportunity to design the elements assuming that certain parts of the glass element will
`never be illuminated. The optical system is designed with lens shift to accommodate off
`axis projection. This limits the size of the illuminated patch on the final element, and
`thus defines limits for our size requirements.
`
`
`
`
`
`
`The identified size is quite large which will impact the practicality of implementation.
`One consideration is to employ an “over-under” design instead of a design offset to the
`side. This should make a difference to the size of the system when handling a rectangular
`patch of light. Smaller size reduces offset in the beams and consequently magnification
`errors and keystone issues.
`
`Magnification:
`
`If a typical path length is 100’ – or 1200 inches and the difference in path length between
`the beams is ~8”, then the magnification difference is 8/1200 0.67%. On a pixel array of
`2000 pixels, this results in 13 pixel difference in magnification. If the two images are
`centered, then this results in a mismatch of 6.5 pixels on each side. This is too much….
`
`Keystone mismatch:
`
`Offset projection apertures will result in different keystone distortion for each beam. I
`think that is what you are calculating with the toe-in calculation
`
`
`REALD INC.
`Exhibit 2108-1
`MASTERIMAGE 3D, et al. v REALD INC.
`IPR2015-00035
`
`
`
`Lens Specs: (diameter of glass in last element)
`
`Numbers refer to the ratio of throw distance to screen width for the operating range of the
`lens. (Lenses are all zoom and have a range)
`
`1.45-1.85 – glass diameter 91mm
`1.8-2.4 – glass diameter 95mm
`2.2-3.0 – glass diameter ~115mm
`5.5 – 8.5 zoom glass diameter 144mm
`
`Note that the projector for 2D applications may use an anamorphic lens as an external
`adapter. The adapter is designed to fit all lenses, and has an input diameter of 135mm
`circle with flats top and bottom, 120mm apart.
`
`Note also that the larger zoom ratio lenses have larger elements, but smaller angles.
`
`Operating Angle
`
`Graph on page 9 – note that the angle is +/- 7 degrees on plot – I assume this is in glass,
`so represents a higher angle in air. (about 10.5 degrees)
`
`More research needs to be done on the population of beam angles.
`
`
`REALD INC.
`Exhibit 2108-2
`MASTERIMAGE 3D, et al. v REALD INC.
`IPR2015-00035
Accessing this document will incur an additional charge of $.
After purchase, you can access this document again without charge.
Accept $ Charge
Still Working On It
This document is taking longer than usual to download. This can happen if we need to contact the court directly to obtain the document and their servers are running slowly.
Give it another minute or two to complete, and then try the refresh button.
A few More Minutes ... Still Working
It can take up to 5 minutes for us to download a document if the court servers are running slowly.
Thank you for your continued patience.
This document could not be displayed.
We could not find this document within its docket. Please go back to the docket page and check the link. If that does not work, go back to the docket and refresh it to pull the newest information.
Your account does not support viewing this document.
You need a Paid Account to view this document. Click here to change your account type.
Your account does not support viewing this document.
Set your membership
status to view this document.
With a Docket Alarm membership, you'll
get a whole lot more, including:
- Up-to-date information for this case.
- Email alerts whenever there is an update.
- Full text search for other cases.
- Get email alerts whenever a new case matches your search.
One Moment Please
The filing “” is large (MB) and is being downloaded.
Please refresh this page in a few minutes to see if the filing has been downloaded. The filing will also be emailed to you when the download completes.
Your document is on its way!
If you do not receive the document in five minutes, contact support at support@docketalarm.com.
Sealed Document
We are unable to display this document, it may be under a court ordered seal.
If you have proper credentials to access the file, you may proceed directly to the court's system using your government issued username and password.
Access Government Site
