chrisnicola Posted January 14, 2019 Share Posted January 14, 2019 I have an Epson V700 scanner and the glass is scratched. The original oem replacement glass with the plastic frame is very expensive. Does anyone know where I can purchase good quality optical glass in Europe to replace the glass myself? Your thoughts would be appreciated. Kind regards Chris. Link to comment Share on other sites More sharing options...
peterbcarter Posted January 14, 2019 Share Posted January 14, 2019 Go to a picture frame shop. Link to comment Share on other sites More sharing options...
wogears Posted January 15, 2019 Share Posted January 15, 2019 Epson Perfection v700 & v750 - Lower Glass Assembly - NEW 766239485901 | eBay Link to comment Share on other sites More sharing options...
rodeo_joe1 Posted January 15, 2019 Share Posted January 15, 2019 Does anyone know where I can purchase good quality optical glass - What makes you think Epson go to the trouble of using 'good quality optical glass'? +1 to getting thin plate glass from a picture framers, or just any decent glaziers. Link to comment Share on other sites More sharing options...
glen_h Posted January 15, 2019 Share Posted January 15, 2019 If it scratches that easily, it might be plastic. In any case, the thickness might be important. -- glen Link to comment Share on other sites More sharing options...
chrisnicola Posted January 15, 2019 Author Share Posted January 15, 2019 Thank you all for your replies. Its definitely glass. I checked the E bay link and $100 including shipping to Europe is too expensive for me. I will check out some Epson suppliers to see if I can get a better price for an oem replacement. This is a $500+ scanner so I guess the glass "should" be better quality that average picture glass. Picture glass will probably be OK for average office scans. However I don't know if it will affect negative scans at 3600 ppi. Then again, 2 or 2.5 mm picture glass might work just fine! I am also thinking of the possibility of going to a computer recycling bin and removing the scanner glass from an all in 1 and cutting to size. Kind regards Chris PS I also got some ideas here: How to replace a broken scanner glass? - HP Photosmart c4780 Link to comment Share on other sites More sharing options...
wogears Posted January 15, 2019 Share Posted January 15, 2019 You DO need glass of the correct thickness. Link to comment Share on other sites More sharing options...
JDMvW Posted January 15, 2019 Share Posted January 15, 2019 You DO need glass of the correct thickness. Or. I suppose, at least to shim it so the top of the glass is at the original height Link to comment Share on other sites More sharing options...
rodeo_joe1 Posted January 16, 2019 Share Posted January 16, 2019 I think the glass beds down onto the plastic frame from below, such that the top surface can only be in one plane. Glass thickness would have some effect on the exact plane of focus, whether at the glass surface or slightly above or below. But the last Epson scanner I looked at hadn't been factory adjusted to optimum focus anyway. Link to comment Share on other sites More sharing options...
chrisnicola Posted January 16, 2019 Author Share Posted January 16, 2019 Yesterday, I took out the old scanner glass with very great difficulty to rotate it 180 degrees so the scratch will be less likely to interfere with the scans. Instead of the top left, the scratch is now in the bottom right of the scan area so it will only show up with A4 scans. I repositioned the glass with good quality double sided mirror tape (flat tape not foam tape according to original specs). That will help until I can get a replacement. The underside of the glass really needed a good clean! The glass is 2.5 mm thick. It measures 37.8 cm x 24.9 cm with smoothed edges to make it safer to handle. I'm not an expert, but it looks just like standard picture glass to me. I am tempted to source some picture glass and replace it. By default, the top of the glass will be at the correct height once positioned in the plastic frame as long as thin flat double sided tape is used. Kind regards Chris Link to comment Share on other sites More sharing options...
bernard_lazareff Posted January 17, 2019 Share Posted January 17, 2019 +1 +1 to getting thin plate glass from a picture framers, or just any decent glaziers. Also consider this is your opportunity to transform your V700 into a V750. At least hardware-wise. Just ask your supplier for "museum glass"; Expensive stuff, almost reflection-free. Gone the flare, the actual Dmax might be closer to the advertised specs. As concerns the thickness. Say you replace 2.5mm glass by 2mm glass. The first-order effect is that the sensor optics are now (0.5)x(0.5)=0.25mm closer to the film. (one of the (0.5) is the difference in thickness; the other the glass index minus one). This should be within the range of the holder adjust. If you can find 2.5mm, even better. Link to comment Share on other sites More sharing options...
glen_h Posted January 18, 2019 Share Posted January 18, 2019 In some cases, the thickness of glass is part of the optical system, besides shifting focus. As light from different directions will have different thickness of glass to go through. The optics of CD/DVD readers/writers are designed based on the thickness of the disk, and its index of refraction, such that it can still focus to a small enough spot, with a relatively large aperture lens. Also, lenses with filters on the rear, common for mirror lenses, include the thickness in the optical design. But this might not be so important for scanners. -- glen Link to comment Share on other sites More sharing options...
rodeo_joe1 Posted January 18, 2019 Share Posted January 18, 2019 Just ask your supplier for "museum glass"; Expensive stuff, almost reflection-free. - Just make sure it's not the type of museum glass with an etched surface. There are a number of grades and types - some with a UV filter (probably not needed), some with a single AR coating, some with multi-coating, and a cheaper type similar to anti-Newton glass that has a dimpled surface. You definitely don't want the latter. Link to comment Share on other sites More sharing options...
chrisnicola Posted January 18, 2019 Author Share Posted January 18, 2019 Thank you all for your comments. I have learned a lot from this thread. If I can't find a cheap OEM part at a good price I will definitely try to replace the glass with 2.5 mm picture glass. I would like to try museum glass but its not available where I am. I have inquired at a local glazier and they told me they only have 2 mm or 3 mm glass but not 2.5 mm. Following the advice I have received from the forum I would only replace according to original spec of 2.5 mm to be safe. Just to clarify, the glass I need to replace is the lower glass not the upper glass. Kind regards Chris Link to comment Share on other sites More sharing options...
10999909 Posted February 9, 2021 Share Posted February 9, 2021 Yesterday, I took out the old scanner glass with very great difficulty to rotate it 180 degrees so the scratch will be less likely to interfere with the scans. Instead of the top left, the scratch is now in the bottom right of the scan area so it will only show up with A4 scans. I repositioned the glass with good quality double sided mirror tape (flat tape not foam tape according to original specs). That will help until I can get a replacement. The underside of the glass really needed a good clean! The glass is 2.5 mm thick. It measures 37.8 cm x 24.9 cm with smoothed edges to make it safer to handle. I'm not an expert, but it looks just like standard picture glass to me. I am tempted to source some picture glass and replace it. By default, the top of the glass will be at the correct height once positioned in the plastic frame as long as thin flat double sided tape is used. Kind regards Chris I know this is an old thread, but I have a question, if you are still looking :) How did you get the glass off the tape? was it easy? And what about removing the tape to replace it? Thanks for any advice! Jon Link to comment Share on other sites More sharing options...
Sandy Vongries Posted February 9, 2021 Share Posted February 9, 2021 I know this is an old thread, but I have a question, if you are still looking :) How did you get the glass off the tape? was it easy? And what about removing the tape to replace it? Thanks for any advice! Jon OP hasn't been seen since Jan 19, 2019 Link to comment Share on other sites More sharing options...
10999909 Posted February 10, 2021 Share Posted February 10, 2021 OP hasn't been seen since Jan 19, 2019 Oh, OK, thanks Sandy. Link to comment Share on other sites More sharing options...
glen_h Posted February 15, 2021 Share Posted February 15, 2021 The service manual for the V700 is available, which should explain how to get it in and out. -- glen Link to comment Share on other sites More sharing options...
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