Nikon Lens Patents

Started Sep 21, 2019 | Discussions
Dibyendu Majumdar Contributing Member • Posts: 766
Nikon Lens Patents
3

Hi,

I posted this on the Nikon SLR lens forum but perhaps this is a better place for it.

We are lucky that Nikon appears to have patents for many if not all Nikkor lenses they have manufactured. I have been compiling a list of these patents, and trying to track down patents for some of the earliest and famous Nikon designs.

If anyone here can point me to patents I should add then please let me know. In particular I haven't yet been able to track down the patent for 105mm f2.5 lens.

https://cameragossip.github.io/nikon-lens-patents.html

Thanks and Regards

Dibyendu

OP Dibyendu Majumdar Contributing Member • Posts: 766
Looking for lens design experts to review

Hi,

I am trying to process some of the lens patent data using opensource software such as 'GNU Goptical' and 'rayopt' which is a Python package.

Initial two attempts are here - both using 'rayopt':

First one is example 1 - Wakamiya patent on Nikon's 50mm f1.4 AIS Nikkor.

https://github.com/cameragossip/cameragossip.github.io/blob/master/lensdesigns/Nikkor-Wakamiya-50mmf1.4_Ex1.ipynb

Second one is example 2 - Haruo patent on Nikon's 58mm f1.4 AFS Nikkor

https://github.com/cameragossip/cameragossip.github.io/blob/master/lensdesigns/Nikkor-Haruo-58mmf1.4-JP2013-019993A-Ex2.ipynb

These are both Jupyter notebooks, and when you view them in Github they should be rendered along with the images.

I am looking for feedback - especially in two areas:

a) Am I doing anything wrong?

b) How to interpret what the diagrams are telling us.

I have no relevant technical knowledge but I am trying to understand/learn.

Thank you in advance!

Regards

Dibyendu

BobORama
BobORama Senior Member • Posts: 2,731
Re: Looking for lens design experts to review

Dibyendu Majumdar wrote:

These are both Jupyter notebooks, and when you view them in Github they should be rendered along with the images.

Clicking on on the links does not do much of anything.

 BobORama's gear list:BobORama's gear list
Pentax K-5 Pentax K-1 Sigma 10mm F2.8 EX DC HSM Diagonal Fisheye Pentax smc DA 18-55mm F3.5-5.6 AL WR Samyang 14mm F2.8 ED AS IF UMC +9 more
OP Dibyendu Majumdar Contributing Member • Posts: 766
Re: Looking for lens design experts to review

BobORama wrote:

Dibyendu Majumdar wrote:

These are both Jupyter notebooks, and when you view them in Github they should be rendered along with the images.

Clicking on on the links does not do much of anything.

Hard to say what your issue might be. You should be able to view the rendered Jupyter notebook.

OP Dibyendu Majumdar Contributing Member • Posts: 766
Re: Nikon Lens Patents
Bernard Delley Senior Member • Posts: 1,490
Re: Nikon Lens Patents, thanks!

Dibyendu Majumdar wrote:

Hi,

I posted this on the Nikon SLR lens forum but perhaps this is a better place for it.

We are lucky that Nikon appears to have patents for many if not all Nikkor lenses they have manufactured. I have been compiling a list of these patents, and trying to track down patents for some of the earliest and famous Nikon designs.

If anyone here can point me to patents I should add then please let me know. In particular I haven't yet been able to track down the patent for 105mm f2.5 lens.

https://cameragossip.github.io/nikon-lens-patents.html

no problem here to see your list at cameragossip. Interesting ! despite that it is difficult to appreciate the patent info as a non-expert.

some notes :

the linked patent for AF-S Micro Nikkor 60mm f/2.8 G  is reported to be in error by Google.

the Remarks column sometimes refers to figures like: See figure 26  . But, there seems to be no path to such figures.

there are interesting discussions with elaborate illustrations for some of these lenses at Pierre Toscani / Optique .

there is an interesting discussion of the AF-S 200mm f/2 G VR  by Marco Cavina

if you could find them, some further patents would be interesting to look up:

a) comparing the nearly equivalent lenses AF-S 24-120mm f/4 G (FX) and AF-S 16-80mm f/2.8-4 G DX

b) AF-S 80-400 f/4.5-5.6 G  a 5x zoom using a super ED glass element (like the 200mm f/2 prime)

c) Af-S 70-200mm f/4 G using a HRI glass element

d) comparing the older AF-S VR 70-300mm f/4.5-5.6 G IF-ED using 2 ED glass elements with the newer AF-P 70-300mm f/4.5-5.6 E ED VR achieving better IQ using only one ED glass element.

OP Dibyendu Majumdar Contributing Member • Posts: 766
Re: Nikon Lens Patents, thanks!

Bernard Delley wrote:

Dibyendu Majumdar wrote:

Hi,

I posted this on the Nikon SLR lens forum but perhaps this is a better place for it.

We are lucky that Nikon appears to have patents for many if not all Nikkor lenses they have manufactured. I have been compiling a list of these patents, and trying to track down patents for some of the earliest and famous Nikon designs.

If anyone here can point me to patents I should add then please let me know. In particular I haven't yet been able to track down the patent for 105mm f2.5 lens.

https://cameragossip.github.io/nikon-lens-patents.html

no problem here to see your list at cameragossip. Interesting ! despite that it is difficult to appreciate the patent info as a non-expert.

some notes :

the linked patent for AF-S Micro Nikkor 60mm f/2.8 G is reported to be in error by Google.

the Remarks column sometimes refers to figures like: See figure 26 . But, there seems to be no path to such figures.

there are interesting discussions with elaborate illustrations for some of these lenses at Pierre Toscani / Optique .

Wonderful thank you. Didn't know about this site.

there is an interesting discussion of the AF-S 200mm f/2 G VR by Marco Cavina

Yes indeed love Marco's site.

if you could find them, some further patents would be interesting to look up:

a) comparing the nearly equivalent lenses AF-S 24-120mm f/4 G (FX) and AF-S 16-80mm f/2.8-4 G DX

b) AF-S 80-400 f/4.5-5.6 G a 5x zoom using a super ED glass element (like the 200mm f/2 prime)

c) Af-S 70-200mm f/4 G using a HRI glass element

d) comparing the older AF-S VR 70-300mm f/4.5-5.6 G IF-ED using 2 ED glass elements with the newer AF-P 70-300mm f/4.5-5.6 E ED VR achieving better IQ using only one ED glass element.

Thanks for the suggestions.

Bernard Delley Senior Member • Posts: 1,490
Re: oops

Dibyendu Majumdar wrote:

Bernard Delley wrote:

some notes :

the linked patent for AF-S Micro Nikkor 60mm f/2.8 G is reported to be in error by Google.

only the link is in error, nothing is said about  the patent itself !

OP Dibyendu Majumdar Contributing Member • Posts: 766
Re: Nikon Lens Patents, thanks!

Bernard Delley wrote:

there are interesting discussions with elaborate illustrations for some of these lenses at Pierre Toscani / Optique .

Thank you once again for the link above, it seems I can add some more designs to my list.

OP Dibyendu Majumdar Contributing Member • Posts: 766
Found patents for some Z Nikkors including 58mm Noct
1

Hi,

Found patents for following Nikon Z lenses:

16-50mm

24-70mm f/4

50mm f1.8

58mm f0.95 Noct

Please see https://cameragossip.github.io/nikon-lens-patents.html.

Above list also includes some of the previously found patents for 14-30mm, 35mm f1.8 etc.

Looks like we may be getting a 105mm f1.8 micro Nikkor as there is a patent for this:

https://patents.google.com/patent/WO2020039912A1/en

Looks very elaborate design.

OP Dibyendu Majumdar Contributing Member • Posts: 766
The 58mm Noct via rayopt
1
Enginel Contributing Member • Posts: 793
Re: Nikon Lens Patents

Not a single one for any of 18-55? Sad

 Enginel's gear list:Enginel's gear list
Pentax Q Sony Alpha NEX-5N Sony E 18-55mm F3.5-5.6 OSS Sony E 50mm F1.8 OSS
OP Dibyendu Majumdar Contributing Member • Posts: 766
Re: Nikon Lens Patents

Enginel wrote:

Not a single one for any of 18-55? Sad

I haven't looked for them yet, been focused more on full frame lenses. The new 16-50 looks very different in design from the existing F mount lenses.

OP Dibyendu Majumdar Contributing Member • Posts: 766
Re: Found patents for some Z Nikkors including 58mm Noct

Dibyendu Majumdar wrote:

Hi,

Found patents for following Nikon Z lenses:

16-50mm

24-70mm f/4

50mm f1.8

58mm f0.95 Noct

Additional information in this thread:

https://www.dpreview.com/forums/post/63831128

OP Dibyendu Majumdar Contributing Member • Posts: 766
This might be for 105mm f1.4 Nikkor
OP Dibyendu Majumdar Contributing Member • Posts: 766
Re: This might be for 105mm f1.4 Nikkor

Dibyendu Majumdar wrote:

https://patents.google.com/patent/WO2019229817A1/en

An earlier patent too refers to the same design:

https://patents.google.com/patent/WO2019116563A1/en

Probably neither is the primary patent...

bclaff Forum Pro • Posts: 10,569
Re: This might be for 105mm f1.4 Nikkor

Dibyendu Majumdar wrote:

Dibyendu Majumdar wrote:

https://patents.google.com/patent/WO2019229817A1/en

An earlier patent too refers to the same design:

https://patents.google.com/patent/WO2019116563A1/en

Probably neither is the primary patent...

Because of curvature and which elements are ED only the earlier one is a possible fit.

So I added Example 3 to the optical bench enev though it isn't perfect.

https://www.photonstophotos.net/GeneralTopics/Lenses/OpticalBench/OpticalBench.htm#Data/WO2019-116563_Example03P.txt,AxisO,OffAxis

That whole patent was a nuisance because it'd for several different designers with different styles of presenting the data.

-- hide signature --

Bill ( Your trusted source for independent sensor data at PhotonsToPhotos )

OP Dibyendu Majumdar Contributing Member • Posts: 766
Re: This might be for 105mm f1.4 Nikkor

bclaff wrote:

Dibyendu Majumdar wrote:

Dibyendu Majumdar wrote:

https://patents.google.com/patent/WO2019229817A1/en

An earlier patent too refers to the same design:

https://patents.google.com/patent/WO2019116563A1/en

Probably neither is the primary patent...

Because of curvature and which elements are ED only the earlier one is a possible fit.

So I added Example 3 to the optical bench enev though it isn't perfect.

https://www.photonstophotos.net/GeneralTopics/Lenses/OpticalBench/OpticalBench.htm#Data/WO2019-116563_Example03P.txt,AxisO,OffAxis

That whole patent was a nuisance because it'd for several different designers with different styles of presenting the data.

I guess this isn't the primary patent for the 105mm ? But it is the best match I have found so far. There is an earlier one for 105mm f1.4 but that is clearly a different design.

OP Dibyendu Majumdar Contributing Member • Posts: 766
Nikkor Z 70-200mm f2.8
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