This is called interference fringe. Caused by differences in lens index and coating index. Blue and red light are out of phase. Most notable under fluorescent lighting. It not noticeable by wearer.
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Type: Posts; User: Chris Bowers; Keyword(s):
This is called interference fringe. Caused by differences in lens index and coating index. Blue and red light are out of phase. Most notable under fluorescent lighting. It not noticeable by wearer.
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Neox G22 with a Chemistie clip as a round seg for easy removal
I think the Vision Council published something on this
You might want to check your water temperature. 65 degrees fis best. If too cold and you will get swirls
Glare by definition is light entering the eye at an unusable angle. AR coating will not change or inhibit that light.
Go into calibration and select option # 5 “off sets”
Sounds like your water is too cold. Best practice is to usewater at 65 F. Direct water in Saint Paul is going to be around 56.5 degrees. Useyour water in a recycled container and cool from ambient...
You should know that these were also indexed. A critcal componant for calculations
Red dye takes up fastest at 185 f and yellow at 210 f. Best temp for even take up is 205 f if your altitude allows
I think many times when we speak of ANSI we do not cover 1.2 purpose. There are two very smart people on this board that help with the creation and maintence of ANSI perhaps we can start a dicusion...
Try viewing under a polariscope
Swim Goggles, Diving mask, moisture chamber clear wraps around???
Thanks Robert I might have to go down this road.
Thanks I do have something coming from them. I have never been able to get the "brightness" of the original
Hi,are there any sources for the Younger PLS 540 lens out there?
Thanks,
Chris
If you had a +15 in an 80mm blank I guessing it would have to be asheric. I think you would lose your fine point focus.
Indepedant of power the total heat is a factor of lens size. Power determines...
parabolic dish might be a better aplication, the power of a lens is constrain by size as well as dioptic power
Simple green is also a good product.
Dac?
RT that depend on the lens index
We need to be careful when stating the exactness of an older manual lensometers. Consider the following Rx… +2.00 – 1.00 @ 90. Somewhere on this lens should exist a meridian with a power of +1.50 and...
I’ve made a lot of poly lenses and with many different processes. About six years ago we started a few of our labs in a cut to polish surface method. About a year into this I noticed that these labs...
I’m confused. Doesn’t the image (following) reverse from base to apex when powers change between minus and plus?
How do we apply Barry’s rule to a Plano powered lens with non parallel surfaces?
As...
icare,
I hope they call before subbing. I've attached a list of availabilities but they do change often.
Chris
Barry,
If you give us BVD, Wrap and panto we can applly on an Rx basis. The more info the better we can optomize these lenses.
Chris