Results 1 to 17 of 17

Thread: Freeform Ft

  1. #1
    Master OptiBoarder LENNY's Avatar
    Join Date
    May 2000
    Location
    BROOKLYNSK, NY USA
    Occupation
    Dispensing Optician
    Posts
    4,351

    Freeform Ft

    Is it possible with the newest Freeform technology to grind a FT seg on the front or on the back of the lens and erase the ledge (make it smoother)?
    It is my understanding that this can be done with round seg...

  2. #2
    Master OptiBoarder
    Join Date
    Oct 2004
    Location
    Down in a hole!
    Occupation
    Dispensing Optician
    Posts
    13,078
    You are correct about the round segs. I have never seen anything about a Ft. Three Rivers Optical in Pitsburgh, Pa is doing the round segs. Maybe you could call and speak to someone there. Sorry, I do not have a number handy.


    Fezz
    :cheers:

  3. #3
    Master OptiBoarder LENNY's Avatar
    Join Date
    May 2000
    Location
    BROOKLYNSK, NY USA
    Occupation
    Dispensing Optician
    Posts
    4,351
    Are they doing it on the back?
    Do they do blended?

  4. #4
    Allen Weatherby
    Join Date
    Jun 2004
    Location
    Florida
    Occupation
    Other Optical Manufacturer or Vendor
    Posts
    1,286

    Multi power lens vs. dual power

    Freeform segments:

    It is in theory possible to do a flat top freeform seg with a blended line of approximately 1 to 2mm. I think the round seg works great. We have had this technology for a few years now but found in the market place PALs are what 90 percent of the Opticians think is high tech and expensive. They think a limited 2 powered lens is not high tech. The advantages to a 2 power lens product is that throughout the fied of each segment you have usable lens area. With a PAL you do have a significant portion of the lens that is not usable. Freeform proper PAL designs do offer about 30% more usable lens area than a traditional PAL but still not the complete lens area.

  5. #5
    Master OptiBoarder
    Join Date
    Oct 2004
    Location
    Down in a hole!
    Occupation
    Dispensing Optician
    Posts
    13,078
    Lenny,
    My understanding is that it is on the front surface, similiar to a blended. I have only done one and that was a while ago, and don't remember. I believe they also offer various sizes based on frame "A" size. They have a 22, 25, and 28. It can be clear or Transitions. I can't offer much else, sorry.


    Fezz
    :cheers:

  6. #6
    Bad address email on file jherman's Avatar
    Join Date
    Jul 2005
    Location
    Leon Springs
    Occupation
    Other Eyecare-Related Field
    Posts
    496

    How?

    How can you have a Free Form Transition?




    quote=Fezz;157658]Lenny,
    My understanding is that it is on the front surface, similiar to a blended. I have only done one and that was a while ago, and don't remember. I believe they also offer various sizes based on frame "A" size. They have a 22, 25, and 28. It can be clear or Transitions. I can't offer much else, sorry.


    Fezz
    :cheers:[/quote]

  7. #7
    ATO Member HarryChiling's Avatar
    Join Date
    Apr 2005
    Location
    Nowhereville
    Occupation
    Other Eyecare-Related Field
    Posts
    7,765
    Quote Originally Posted by James Herman
    How can you have a Free Form Transition?
    Jmaes, freeform is just the process and can be used on any blank. Although the front surface of a transition blank cannot be ground the back can with a free form design.
    1st* HTML5 Tracer Software
    1st Mac Compatible Tracer Software
    1st Linux Compatible Tracer Software

    *Dave at OptiVision has a web based tracer integration package that's awesome.

  8. #8
    Manuf. Lens Surface Treatments
    Join Date
    Aug 2002
    Location
    in Naples FL for the Winter months
    Occupation
    Other Optical Manufacturer or Vendor
    Posts
    23,240

    Thumbs up They think a limited 2 powered lens is not high tech

    Quote Originally Posted by AWTECH View Post
    ........................but found in the market place PALs are what 90 percent of the Opticians think is high tech and expensive. They think a limited 2 powered lens is not high tech.
    I think that that they do not think.............or have been brainwashed not to think, or money talks louder than thinking.

    :hammer: :hammer: :hammer:

  9. #9
    Master OptiBoarder
    Join Date
    Oct 2004
    Location
    Down in a hole!
    Occupation
    Dispensing Optician
    Posts
    13,078
    Jim,

    I am not an expert on the subject at hand and my info may be a bit suspect. The product is from Three Rivers Optical(www.3riversoptical.com). They cal it "Free" Lens Series, TR O seg and TR O Blended Seg. My understanding is that it was made using the "freeform" technology. We all know how that word Freeform is misunderstood. The list of material availability lists, platsic, poly, poly polarized, transitions, 1.60, 1.67, 1.70, polarized mid index, etc. This list is from the August issue of Opticourier, last page(51). I do not work for or have an interest in this company. Good luck on your search.


    Fezz
    :cheers:
    Last edited by Fezz; 09-21-2006 at 10:06 AM. Reason: addition

  10. #10
    Allen Weatherby
    Join Date
    Jun 2004
    Location
    Florida
    Occupation
    Other Optical Manufacturer or Vendor
    Posts
    1,286

    Freeform Transissions

    James Herman:
    How can you have a Free Form Transition?
    We are going to release a freefrom PAL Transission product within about 30 days. It starts as a spherical semi-finished blank with transisions on the front surface. We then apply our PAL individual design to the back surface.

    If you want more information on this product contact me via e-mail or private message.

  11. #11
    Bad address email on file jherman's Avatar
    Join Date
    Jul 2005
    Location
    Leon Springs
    Occupation
    Other Eyecare-Related Field
    Posts
    496

    I was thinking of Free Form Gererating

    not Free Form design, sorry for the confusion.

  12. #12
    Allen Weatherby
    Join Date
    Jun 2004
    Location
    Florida
    Occupation
    Other Optical Manufacturer or Vendor
    Posts
    1,286

    Freeform

    James Herman:
    I was thinking of Free Form Gererating
    not Free Form design, sorry for the confusion
    Now I am confused by this statement please clarify. My goal is to help board members understand freeform processes and the application of these processes to produce lenses.

    Freeform manufacturing is only good when used with excellent design software.

  13. #13
    Bad address email on file jherman's Avatar
    Join Date
    Jul 2005
    Location
    Leon Springs
    Occupation
    Other Eyecare-Related Field
    Posts
    496

    ?????

    manufacturing front and back surfaces, Free Form Generation?

  14. #14
    Allen Weatherby
    Join Date
    Jun 2004
    Location
    Florida
    Occupation
    Other Optical Manufacturer or Vendor
    Posts
    1,286

    Freeform

    James, thanks for the clarification. I contend many freeform front and backside designs were created to avoid existing patents on spherical front surfaces.

  15. #15
    Master OptiBoarder
    Join Date
    Oct 2004
    Location
    Down in a hole!
    Occupation
    Dispensing Optician
    Posts
    13,078
    Allen,
    Do you have any insight as to the above in question lenses? If they are truly a freeform design using the freeform surfacing capabilities, then Ice-Tech should at some point be able to produce the same offerings, true?


    Fezz
    :cheers:

  16. #16
    Allen Weatherby
    Join Date
    Jun 2004
    Location
    Florida
    Occupation
    Other Optical Manufacturer or Vendor
    Posts
    1,286

    Freeform

    Fezz;

    ICE-TECH does have the capabilities to make backside rounded segment keeping a spherical front surface.

    Although we can make the segment any size we prefer to select the segment size based on patient Rx and frame choice.

  17. #17
    Master OptiBoarder
    Join Date
    Oct 2004
    Location
    Down in a hole!
    Occupation
    Dispensing Optician
    Posts
    13,078
    Thanks Allen.


    Fezz
    :cheers:

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Freeform generating
    By rsandr in forum General Optics and Eyecare Discussion Forum
    Replies: 11
    Last Post: 12-12-2007, 02:01 AM
  2. New Mapper for FreeForm Lenses
    By F.Bourreau in forum Progressive Lens Discussion Forum
    Replies: 0
    Last Post: 09-07-2006, 09:37 AM
  3. High cyl freeform PAL?
    By Ory in forum Progressive Lens Discussion Forum
    Replies: 4
    Last Post: 08-20-2006, 10:43 AM
  4. Freeform Click-Fee
    By tomchee in forum General Optics and Eyecare Discussion Forum
    Replies: 0
    Last Post: 05-03-2006, 12:37 PM
  5. FreeForm lenses and Generators. Any Info?
    By RGV Optical Lab in forum Ophthalmic Optics
    Replies: 14
    Last Post: 02-16-2006, 09:40 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •