my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » Orcon Lamphouse Mirror Replacement

Author Topic: Orcon Lamphouse Mirror Replacement John Cruz Film Handler Posts: 8 From: NY, NY, USA Registered: Sep 2011 posted 10-25-2011 01:58 PM                     Hi, On several occasions when accessing the "lamp chamber" in our Orcon CV 2000 lamphouses, I noticed the 45 degree mirrors were oddly discolored. One of our lamphouses has greenish streaks (they look more like scratches or very thin, long cracks) on the mirror where the vertical xenon bulb light is reflected off of. Another one has a purple discoloration in the same area. Both of the mirrors I recently saw are also slightly translucent, at least on the edges of the mirror where I noticed this. I can't recall how the other mirrors look right now, but my guess is that they are similar in appearance. My question is, when should the mirrors be replaced? I found two brand new replacement mirrors burried in our booth. As far as I know, the current mirrors haven't been replaced (or cleaned) for 5 years at the very least. I was searching for threads that would answer my question but came up empty handed. I did read that the lamphouses should be cleaned, and the blower should be dust free. Our lamphouses have a very thick layer of cotton-like dust all over the place, including in the blower, wiring, etc... (I am assuming cleaning that should be on my priority list now that I know ) The door to the "xenon bulb chamber" has instructions on how to clean the mirror. I will give it my best shot (unless that is not a good idea for some reason), but was also wondering whether both sides of the mirror should be cleaned. The side reflecting into the projector is a bit dirty, but not nearly as bad as the flip side, which has noticeable dust accumulation on the surface.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 10-25-2011 02:15 PM                        You can also "reverse" the oblique reflector. Swap the 2 parts so that the unused (good) reflector is at the center and the bad parts are away from where the light is. Louis  |  IP: Logged John Cruz Film Handler Posts: 8 From: NY, NY, USA Registered: Sep 2011 posted 10-25-2011 02:54 PM                     Louis, great advice. I noticed the "mirror" / reflector is composed of two separate smaller mirrors. Are you saying I should swap those (put the one that is on the "bottom", currently not reflecting light, on "top") or should I just flip over the individual mirror that is starting to "fade"? As a side note, does the picture quality suffer if the mirror is left unchanged for a (very) long time? We had a distributor come in with a tech last week to tech a film they were opening and the tech said we were within the SMPTE standards, almost dead on 16 footlamberts (through the portglass in the booth) on the screen with the green "scratched" mirror.  |  IP: Logged Sean McKinnon Phenomenal Film Handler Posts: 1712 From: Peabody Massachusetts Registered: Sep 2000 posted 10-29-2011 01:55 AM                        quote: John Cruz through the portglass in the booth Ugh!  |  IP: Logged

All times are Central (GMT -6:00)

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.