EXHIBIT 2147
`EXHIBIT 2147
`
`
`
`

`
`RE: Lenses for prototype
`
`From:
`Matt Cowan <"/o=reald/ou=first administrative group/cn=recipients/cn=mcowan">
`To:
`Ying-Moh Liu <yml7245@yahoo.com>, Lenny Lipton <llipton@reald.com>, Jerry Carollo
`<jcarollo@creativedis.com>
`Cc:
`Michael Hoppe <mhoppe@creativedis.com>, Mahir Abrahim <mabrahim@creativedis.com>, Bill
`Maffucci <bmaffucci@creativedis.com>
`Date:
`Thu, 28 Sep 2006 15:53:42 -0700
`
`Ying-moh:
`
`
`1. We need a system that will work for both situations. What are the implications of different
`projection distances and different angles? The Clarity is approximately 52' throw and 26' screen
`width. Lenny can probably dig up exact numbers.
`
`
`2. The throw ratios are complicated by using less pixels of the DMD.
`
`
`
`
`
`if the throw ratio is 1.45:1 using 2048 pixels of the DMD, then using 1628 pixels, the ratio
`of screen width (usable) to distance becomes 1.82:1 Our image is narrower that the
`maximum that the lens can handle, but our object (DMD pixels) are also narrower. You
`are right that the full width DMD angle at 1.45 is 38 degrees - clearly beyond our design
`target. But using only 1628 pixels, the angle becomes 30.6 degrees (slightly over
`design). In the El Cap theatre the lens setting will be slightly narrower than 1.45 (1.47 I
`think) which brings the angle below 30 degrees (by a tiny amount.)
`I don't have the Clarity lens at my finger tips, but the labeled focal range should be
`something like 40.6mm and 50.4mm - Lenny can you look at your notes on this?
`
`Maybe I'm not being clear - and we should discuss this on the telephone?
`
`
`3. We would like to design for both flat and scope modes. My suggestion would be to design for
`30 degrees in Flat mode and all situations will be covered.
`
`
`
`
`
`some theatres are "common height" meaning that the side curtains go out for scope and
`come in for flat, keeping the same height for flat and scope.
`some theatres are "common width", meaning that the top curtain goes up for flat, keeping
`the same horizontal width for flat and scope.
`
`4. Lenny can you look at the Barco lens and figure out dimensions?
`
`I am hoping that our primary design constraint is the 30 degree horizontal angle and we can
`accommodate Clarity and El Cap (different focus positions and zoom lengths) by putting shims on
`the mounting platform (of something like that). As I see it, we will have several different lens
`settings we need to accommodate, which will drive the Z location of the apparatus (distance from
`the front of the projector). Flat and scope each for El Cap and Clarity. I hope the different throw
`distances (52' and 71') between the two situations can be tuned by mirror pointing and any
`difference required in radius of the mirror can be dialed in.
`
`
`REALD INC.
`Exhibit 2147-1
`MASTERIMAGE 3D, et al. v REALD INC.
`IPR2015-00035
`
`

`
`If the project just got more complicated, then lets have a discussion tomorrow in case I'm missing
`something.
`
`
`Matt.
`
`
`
`
`From: Ying-Moh Liu [mailto:yml7245@yahoo.com]
`Sent: Thursday, September 28, 2006 6:03 PM
`To: Lenny Lipton; Jerry Carollo; Matt Cowan
`Cc: Michael Hoppe; Mahir Abrahim; Bill Maffucci
`Subject: RE: Lenses for prototype
`
`
`
`Lenny and Matt:
`
`I have a few questions related to my optical design setup and would like to get your inputs.
`
`
` Would you tell us if we are designing for the Clarity theater or the El Capitan?
`* What size is the Clarity theater screen and what is the throw distance?
`* If we are designing for TR of 1.45-1.8 as Matt suggested, do we keep the throw distance the same for
`both cases?
`* Please check the attached diagram to see if it is what you understand in the lens retract vs TR.
`* For TR of 1.45, I calculated the FOV to be 38 deg. and the focal length to be 32.33mm when projecting
`1628 pixels wide. f=0.5*1628*0.01368/tan(19)=32.33mm. This focal length is outside of your described
`50.7-67.8mm. What am I missing? Do you actually project TR of 1.45 in Clarity theater?
`* Do we design for the "flat" mode with 1.85:1 aspect ratio?
`*
`
`
`Hope to get your input on the above soon. Thank you.
`
`
`Ying-Moh
`
`Lenny Lipton <llipton@reald.com> wrote:
`Jerry
`
`
`That should have been as follows:
`
`
`This is a good question. The lens on the Barco on my floor which
`has a zoom range of 40.7 - 50.9 mm moves through a little more
`than 30 mm. The front element translates from recessed to
`flush.
`
`
`The Clarity theater lens which is 50.7 - 67.8 retracts from flush to
`more than a 45 mms.
`
` *
`
`From: Jerry Carollo [mailto:JCarollo@creativedis.com]
`Sent: Monday, September 25, 2006 3:55 PM
`To: Matt Cowan; Lenny Lipton
`Cc: Michael Hoppe; Ying-Moh Liu; Mahir Abrahim; Bill Maffucci
`Subject: RE: Lenses for prototype
`
`
`
`REALD INC.
`Exhibit 2147-2
`MASTERIMAGE 3D, et al. v REALD INC.
`IPR2015-00035
`
`

`
` Matt:
`
`
`How much does the lens need to move to go from TR 1.45 to 1.8? I think we
`may have up to 20mm space to accommodate the focus change but and the other
`lens type but we need at the mechanical design to know for sure.
`
`
`Thanks
`
`
`Jerry
`
`
`
`From: Matt Cowan [mailto:mcowan@reald.com]
`Sent: Monday, September 25, 2006 11:09 AM
`To: Jerry Carollo; Michael Hoppe; Ying-Moh Liu; Mahir Abrahim; Lenny Lipton
`Subject: Lenses for prototype
`
`
`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.
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`
`REALD INC.
`Exhibit 2147-3
`MASTERIMAGE 3D, et al. v REALD INC.
`IPR2015-00035