Design advantages of Doublet vs Triplet?

Would anyone care to comment on the specific design advantages of a
triplet over a doublet or vice versa?

I have a few suspicions, but it would be nice to see them confirmed
(or not).

Thanks

Tom T.

Would anyone care to comment on the specific design advantages of a
triplet over a doublet or vice versa

You can answer that yourself by joining the new ATMOS lens design group on
Yahoo.

http://groups.yahoo.com/group/ATM_Optics_Software/

Roland Christen

(Chris1011) wrote in message ...
Would anyone care to comment on the specific design advantages of a
triplet over a doublet or vice versa

You can answer that yourself by joining the new ATMOS lens design group on
Yahoo.

http://groups.yahoo.com/group/ATM_Optics_Software/

Roland Christen

I joined - there's - err - rather little traffic at the moment.

I take it you feel there are no clear cut quick answers to my question
and it will take a certain amount of learning and design before I
understand the differences, and this is something one has to do
themselves?

As much as I do enjoy learning things through and through, and will
agree there's nothing like discovering for yourself - if you (or
anyone else) would care to summarize (in laymans terms) I'd appreciate
it.

I joined - there's - err - rather little traffic at the moment.

You can generate some traffic if you ask your question there. I'm sure it would
be an interesting excercise for people on that group (and yourself if you care
to do some design).

Rolando

"Chris1011" wrote in message
...
I joined - there's - err - rather little traffic at the moment.

You can generate some traffic if you ask your question there. I'm sure it
would
be an interesting excercise for people on that group (and yourself if you
care
to do some design).

Go ahead Tom, ask! The water's fine so dive in.

The reason there is little traffic is the group is barely 24 hours old.
Yours will be the first question and a fun one for the group.

Clear Skies

Chuck Taylor
Do you observe the moon?
Try http://groups.yahoo.com/group/lunar-observing/

Are you interested in optics?
Try http://groups.yahoo.com/group/ATM_Optics_Software/

************************************

Rolando

"CLT" not@thisaddress wrote in message ...
"Chris1011" wrote in message
...
I joined - there's - err - rather little traffic at the moment.

You can generate some traffic if you ask your question there. I'm sure it
would
be an interesting excercise for people on that group (and yourself if you
care
to do some design).

Go ahead Tom, ask! The water's fine so dive in.

The reason there is little traffic is the group is barely 24 hours old.
Yours will be the first question and a fun one for the group.

Clear Skies

Chuck Taylor
Do you observe the moon?
Try http://groups.yahoo.com/group/lunar-observing/

Are you interested in optics?
Try http://groups.yahoo.com/group/ATM_Optics_Software/

************************************

Rolando

Been there, asked, and am listening to the sound of crickets.... g

Tom T.

Tom T. wrote in message news:1101808348.2g4mXXTBaGGjftrue4FRSA@teranews. ..
I've asked.



T


Sorry about the multiple posts.

T

"Tom T." wrote in message

Would anyone care to comment on the specific design advantages of a
triplet over a doublet or vice versa?

I have a few suspicions, but it would be nice to see them confirmed
(or not).

Tom, its my understanding that the primary benefit of a triplet object over
a doublet is the added color correction that is possible with three lenses.

Roland C. has posted elsewhe

"To clarify the situation on color correction a bit more for those who'se
eyelids have not already closed and are nodding away from all this technical
mumbo-jumbo, I will attempt to explain where achros, EDs, fluorites etc fit
into the scheme of things by comparing the ability of each design to produce
a reasonably focused image spot diameter over its wavelength range.
Reasonably focused being somewhere around 25 microns. Fast 6"F8 Cde
achromat: 550 - 650 nmLong 6"F15 CeF achomat: 480 -650 nmFast 6"F9 ED
doublet: 450 - 650 nmFast 6" fluorite doublet: 420 - 1000 nm Fast 6"
FPL52/53 triplet: 380 - 1000 nm Fast 6" fluorite triplet: 360 - 1000 nm"

"Ed T" wrote in message

Tom, its my understanding that the primary benefit of a triplet object over
a doublet is the added color correction that is possible with three
lenses.

Roland C. has posted elsewhe

"To clarify the situation on color correction a bit more for those who'se
eyelids have not already closed and are nodding away from all this
technical mumbo-jumbo, I will attempt to explain where achros, EDs,
fluorites etc fit into the scheme of things by comparing the ability of
each design to produce a reasonably focused image spot diameter over its
wavelength range. Reasonably focused being somewhere around 25 microns.

Fast 6"F8 Cde achromat: 550 - 650 nm
Long 6"F15 CeF achomat: 480 -650 nm
Fast 6"F9 ED doublet: 450 - 650 nm
Fast 6" fluorite doublet: 420 - 1000 nm
Fast 6" FPL52/53 triplet: 380 - 1000 nm
Fast 6" fluorite triplet: 360 - 1000 nm"

Better?
Ed T.

Thanks Ed. I appreciate the quote and the quantification.

T

"Ed T" wrote in message link.net...
"Ed T" wrote in message

Tom, its my understanding that the primary benefit of a triplet object over
a doublet is the added color correction that is possible with three
lenses.

Roland C. has posted elsewhe

"To clarify the situation on color correction a bit more for those who'se
eyelids have not already closed and are nodding away from all this
technical mumbo-jumbo, I will attempt to explain where achros, EDs,
fluorites etc fit into the scheme of things by comparing the ability of
each design to produce a reasonably focused image spot diameter over its
wavelength range. Reasonably focused being somewhere around 25 microns.

Fast 6"F8 Cde achromat: 550 - 650 nm
Long 6"F15 CeF achomat: 480 -650 nm
Fast 6"F9 ED doublet: 450 - 650 nm
Fast 6" fluorite doublet: 420 - 1000 nm
Fast 6" FPL52/53 triplet: 380 - 1000 nm
Fast 6" fluorite triplet: 360 - 1000 nm"

Better?
Ed T.