`EXHIBIT 2144
`
`
`
`
`
`Lenses for prototype
`
`From:
`Matt Cowan <"/o=reald/ou=first administrative group/cn=recipients/cn=mcowan">
`To:
`Jerry Carollo <jcarollo@creativedis.com>, Michael Hoppe <mhoppe@creativedis.com>, Ying-Moh Liu
`<yml7245@yahoo.com>, Mahir Abrahim <mabrahim@creativedis.com>, Lenny Lipton <llipton@reald.com>
`Date:
`Mon, 25 Sep 2006 11:09:06 -0700
`
`Jerry et al:
`
`
`We will be providing you with two lenses.
`
`
`The primary one we want to work with is 1.45 to 1.8. (I don't have drawings but from memory it is the one
`with the extended hood that needs to be machined off.) The secondary one is the 1.8 to 2.4. The 1.45-
`1.8 lens is the one used essentially all the time in the Clarity theatre.
`
`
`We understand that the intended working cone angle is 30 degrees (full angle) maximum and that this
`means about 1.8:1 actual throw to width ratio. Because we use less than the full width of the DMD, the
`advertised number for the lens represents a wider picture than we actually achieve, so in fact in our
`operation for flat pictures using 1628 of 2048 pixels horizontally, we are at a throw ratio of about
`1.5 referencing the full width DMD, but equating to 30 degrees full angle.
`
`I hope this is clear - if not perhaps we should have a quick telcon to make sure we are on the same page.
`
`
`One point I was thinking about - Focusing the lens consists of moving it in and out of its mount via a
`sliding mechanism. This will change the actual location in the Z dimension of the end of the lens. Have
`you allowed for adjustment (a one time set-up) in this dimension to accommodate this focus
`movement? It is probably what is also required to accommodate two different lenses.
`
`
`Matt.
`
`REALD INC.
`Exhibit 2144-1
`MASTERIMAGE 3D, et al. v REALD INC.
`IPR2015-00035
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