| View previous topic :: View next topic |
| Author |
Message |
jamaeolus
Joined: 19 Mar 2014
Posts: 2934
Location: Eugene
Expire: 2015-08-20
|
 Posted: Tue Jun 07, 2016 12:03 am Post subject: New optical materials. |
 |
|
jamaeolus wrote:
Not low dispersion glass not even glass at all, but metamaterials. Lenses engineered at the nano scale to take advantage of the characteristics of light at various wavelenghts.
http://www.techtimes.com/articles/163169/20160606/what-are-the-advantages-of-planar-metalens-over-convectional-lens.htm
_________________
photos are moments frozen in time |
|
| Back to top |
|
 |
calvin83
Joined: 12 Apr 2009
Posts: 7553
Location: Hong Kong
|
| Posted: Tue Jun 07, 2016 3:18 am Post subject: |
|
|
calvin83 wrote:
Negative-index metamaterial has been invented and studied for more than ten years. 
_________________
https://lensfever.com/
https://www.instagram.com/_lens_fever/
The best lens is the one you have with you. |
|
| Back to top |
|
|
Teemō
Joined: 07 Apr 2016
Posts: 586
Location: Australia
|
| Posted: Tue Jun 07, 2016 6:42 am Post subject: |
|
|
Teemō wrote:
Looks like it works on diffraction principles. |
|
| Back to top |
|
|
visualopsins
Joined: 05 Mar 2009
Posts: 10569
Location: California
Expire: 2025-04-11
|
| Posted: Tue Jun 07, 2016 8:08 pm Post subject: |
|
|
visualopsins wrote:
I've also noticed this story resurfaces every few years...
So far the scale is limited to microscopic lenses, such as those used in laser fiber optics communications, to squeeze in more bandwidth.
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (151B), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
|
|
| Back to top |
|
|
Mike Deep
Joined: 25 Oct 2008
Posts: 316
Location: Upstate New York
|
| Posted: Tue Jun 07, 2016 9:16 pm Post subject: |
|
|
Mike Deep wrote:
I'm sick of hearing about metamaterials and nanotech. Let me know when some of it escapes the lab.
_________________
Rocket Launch Photography
Olympus: 24/2.8 MC, 28/3.5, 28/2.8 MC, 35/2.8, 50/3.5, 50/1.8, 50/1.4 MC, 35-70/3.6, 75-150/4
Nikon: C 24/2.8, AI-S 28/2.8, K 35/2.8, F 55/3.5, F 105/2.5, F 135/2.8, F 200/4, No. 5T
Pentax: 28/3.5, 35/3.5, 50/1.4 (v1), 50/1.4 (v2), M 50/1.4, SMC 55/1.8, 105/2.8, SMC 135/3.5, 150/4
Tamron: SP 17/3.5 151B, 135/2.8 T-135, SP 300/2.8 60B, SP 35-80/2.8-3.8 01A, 80-210/3.8-4 103A, SP 1.4x TC 140F, SP 2x TC 01F
Vivitar: 24/2 (Kino), 28/2 (Kino), 50/1.4 (Cosina), S1 90/2.5 (Tokina), S1 28-80/2.8-3.5 (Kino), 70-150/3.8 (Kino), S1 70-210/3.5 (Kino), 2x Macro TC
Etc: Yashica 3.5cm/2.8, Fujinon 50/1.4, Yashica ML 50/1.4, Tomioka Yashinon 55/1.2, Mamiya/Sekor 55/1.7, Sigma 90/2.8
That's a lot of 50s. |
|
| Back to top |
|
|
Teemō
Joined: 07 Apr 2016
Posts: 586
Location: Australia
|
| Posted: Wed Jun 08, 2016 8:09 am Post subject: |
|
|
Teemō wrote:
| visualopsins wrote: |
So far the scale is limited to microscopic lenses, such as those used in laser fiber optics communications, to squeeze in more bandwidth. |
Is that because it's fragile? |
|
| Back to top |
|
|
visualopsins
Joined: 05 Mar 2009
Posts: 10569
Location: California
Expire: 2025-04-11
|
| Posted: Mon Jun 13, 2016 6:25 pm Post subject: |
|
|
visualopsins wrote:
| Teemō wrote: |
| visualopsins wrote: |
So far the scale is limited to microscopic lenses, such as those used in laser fiber optics communications, to squeeze in more bandwidth. |
Is that because it's fragile? |
Scaling beyond microscopic lens size, yes, fragile describes the current limitation. Easy to imagine a slight breeze completely destroying a large lens! They will probably hang it on some sort of scaffold for larger lenses, with some degrade from a perfect optic.
_________________
☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮ like attracts like! ☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮☮
Cameras: Sony ILCE-7RM2, Spotmatics II, F, and ESII, Nikon P4
Lenses:
M42 Asahi Optical Co., Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200, Tele-Takumar 1:5.6/200, 1:6.3/300, Macro-Takumar 1:4/50, Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm, Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element), Super-Multi-Coated Fisheye-TAKUMAR 1:4/17, Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500, Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100, Super-Multi-Coated Bellows-TAKUMAR 1:4/100, SMC TAKUMAR 1:1.4/50, 1:1.8/55
M42 Carl Zeiss Jena Flektogon 2.4/35
Contax Carl Zeiss Vario-Sonnar T* 28-70mm F3.5-4.5
Pentax K-mount SMC PENTAX ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (151B), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto (Kiron)
|
|
| Back to top |
|
|
Teemō
Joined: 07 Apr 2016
Posts: 586
Location: Australia
|
| Posted: Mon Jun 13, 2016 7:39 pm Post subject: |
|
|
Teemō wrote:
| visualopsins wrote: |
| Teemō wrote: |
| visualopsins wrote: |
So far the scale is limited to microscopic lenses, such as those used in laser fiber optics communications, to squeeze in more bandwidth. |
Is that because it's fragile? |
Scaling beyond microscopic lens size, yes, fragile describes the current limitation. Easy to imagine a slight breeze completely destroying a large lens! They will probably hang it on some sort of scaffold for larger lenses, with some degrade from a perfect optic. |
Perhaps it is also possible to use an array of multiple lenses and sensors and post-processing to increase the aperture. The optics have all the resolution wide open anyway. |
|
| Back to top |
|
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
Search
Memberlist
Register
Profile
Log in to check your private messages
Log in
