I guess we just don't agree and won't. I might be wrong, but I just don't understand your arguments. Thanks a lot for the time you spent responding to this thread. I will contact the standard experts...
Type: Posts; User: thomasz; Keyword(s):
I guess we just don't agree and won't. I might be wrong, but I just don't understand your arguments. Thanks a lot for the time you spent responding to this thread. I will contact the standard experts...
Hi lensgrinder,
I don't agree with you on both points :
- For uncut SV lenses without a prescribed prism, the PRP is the geometrical center and can be different from the OC where the prism is...
English is not my first language as you probably noticed ;-)
I got your point. Maybe it is a matter of language...
I will address my concern to the Vision Council.
Thank you!
@MikeAurelius
Sorry if I wasn't clear. I'm considering a centered SV lens without any prescribed prism but with a power close to zero.
Let's say SPH=0.25D, PRVM=0.
During the inspection, the...
Hi lensgrinder and ml43,
Thanks for taking the time to respond!
I'm sorry but I don't follow you guys :-)
I understand the discussion for decentered SV can be more complex.
However, the...
That's a bit funny Mike :-)
Let's say that I agree with you, it is (A or B)!
Either the prism is lower than 0.33D or the distance from the PRP to the point where the prescribed prism is met is...
MikeAurelius, I agree with you on the two parts, one giving the concept and one giving the procedure to apply this concept.
However, I really don't agree with you in that case since the concept is...
@MakeOptics
Sorry if I wasn't clear. Actually, to be able to compare the two conditions under the same graphs, I consider the case of a spherical lens.
For such a lens, the relation between the...
@MikeAurelius.
In my situation, it is very important to understand exactly what the standard means.
I agree with you regarding §5.1.4 but, if you read §8.4 carefully, you will realize it is a "OR"...
@MikeAurelius.
Please read them again then.
To, me the logic is clearly different.
If A and B are two conditions, (A OR B) is different from (A AND B)!
@ lensgrinder
Thanks for your reply.
The distinction between uncut and mounted is not relevant to me since 5.1.4 and 8.4 are general paragraphs.
I also believe that a plano with a prism < 0.33cm/m...
Hi everyone,
I have a question regarding the prism inspection as described by the ANSI Z80.1 (2010) standard.
Indeed, it seems to me that there is a contradiction between two paragraphs and I...