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Are you refering to a good or bad impression about theire lenses?

Yes we can compare them theoreticly but i would like to get some professionnal point of view.

the diamond ball in optotech generator allow to generate lens with rustler cutting, this take a long time but give a better lens, in the same time you can use the same ball in a spiral cutting, you...

Hi

in below 2 cylinder map of 2 different progressive lenses.
how do you find them?
These 2 lenses are surfaced whith 2 different way (one is totally internal progression made by freeform...

The only way to reduce the swim effect is by reducing the prism thinning value and with a double aspheric lens design.
Sure E is using a lot of marketing Pressure, and this pressure will make the...

I don't Know if it is the right place to post it but I will try.

Did anyone know what is the best way to increase the hardeness (bayer test) of the coating ?

Is it using ionic assistance...

Thanks :)

Hi every body

Can some one give me a link to a web site that can give ALL the ingreaving marks of ALL the world PAL lenses


Thanks

Bye Bye

We are not in a ware

try to be more objective and I am sûre that you and all others will well understand every thing

can some one give us a real definition Of the "power compensation " and...

From my point Of view
I agree that The panto and the vertex can never be exact 100% but is better to have one near value then nothing that is why i think that the vertex and the panto can not be...

Hi every body
doas some one have a software or a web site which calculate the exact power refering to the Warp angle, pantoscopic angle and the vertex distance for a PAL lenses?

I am teatching...

What are the most important parameters that we must consider to choose the best seller?
the prices ares far one from others and ll said that these quality is the best !

What do you use for checking the maps of your freeform produstion ?
there is the lens analyzer from visionix, mecanical analyser from optotech....
can you advice me what is the best ?
regards

We tryed satis and also optotech
satis is good for power range
optotech is good for quality of the surface
with the satis until, now (more then 2 years) we can not make a good trivex lenses but...

optiswiss, shamir, indo, seiko all these laboratories have there one design and they sell it to other .

Why you do not like to explain in the forum?

is there a standart procedure to calibrate a lens meter the supplier Of the SHIN NIPPON in our country can not help us !!!!

also another power :

sph -2.50
==> SLM 4000 => -2.60 (-0.1)
==> Essilo => -2.57 (-0.19)
It make me creazy !!!...

Barry can you please explain?

but the difference that I have is 0.11!! it is not small difference !

I have 2 Shin-nippon lensmeter SLM4000 and SLM5000 one I am using them in the quality control step in my surfacing lab.
the prolem that the mesurment that I am making with the First SLM4000 is...

can you help me how to calibrate them?

I am using 2 shinipon lens meter in my lab and there is a difference between the 2 one when I mesure By 0.01 step some times the difference is in SPH and some times in Cyl. the difference can be more...

The ADD was 2.5 in a 16mm fitting high 7mm corridor!!
I thing that it is so strong no !!

What Does it mean if one progressive wearer tell you I have problem in the intermedient area?
I s the design is not OK or the fitting Or what .?