Re: New Invention Ideas

mustafa umut sarac wrote:
I researched anamorphic cinema camera lenses at internet and i
discovered a lomo anamorphic lens and its design drawing.
Suddenly a new idea came to my mind. I was always thinking that it was
necessary to have double sided double curvature lens for to
manufacture great lens. Lomo lens was contradictory to this . Light
entrance side of the lens element was flat and the second lens
elements one side was flat again.
It is possible to find this kind of lens elements easier from surplus
lens sellers for to create your own lens.

Lenses have to be designed, they don't work by accident. There are lots of patent lens designs, and some of them are even useful.

The physics and engineering of lenses hasn't changed very much in 100 years--we now have optimizing ray tracing programs, automatic surface generators that can make aspherics, computerized measuring interferometers, somewhat better glass, and much better coatings, but the basic tradeoffs are the same, and many of the same designs are still in use. (Real lens designers, please chime in--have I left anything out of this list?)

In half that amount of time, we went from the Wright Flyer to Sputnik, and from mechanical adding machines to Google. Optical systems design is a slow-moving field, and there are good reasons for that. People have been making eyeglasses since the 13th century. The properties of curved mirrors were known to Archimedes, and those of lenses to the tenth-century philosopher Alhazen around 1000 AD.

Or it is more basic to
manufacture these lens elements from hot press , cold press ,
etching , mrf , ion etch or other manufacturing techniques or mold
with plastic or plastic ceramic , crystal particle mix.
New technology is promising us to manufacture a new lens element with
the help of diffractive optics.

Diffractive optics is useful for small tweaks on a mainly-refractive system--a few waves' worth of aspheric term or colour correction. Used for the main ray-bending task, diffractive optics are a complete disaster--their chromatic dispersion is a good two orders of magnitude worse than that of a glass lens, and their off-axis performance is horrendous. This approach was tried and (mostly) abandoned in hologon scanners many years ago.

Diffractive optics generally made with hot pressing of circular
elements to the plastic film or directly to the lens.
There is a need of making diffractive optics for the sides of glass ,
crystal lenses , laser rods , semiconductor manufacturing.
Chemical etching of glass and tiffdruck -rotogravure - technique
reminds me a new idea.
A - Flat side of the lens element could be coated with tiffdruck paper
or gelatin or other chemical . Than a diffractive optics image could
be enlarged on this coating or enlarged or contact printed with the
help of lcd screen.
Than diluted acid could be applied to the film and harder parts
degenerate later , softer parts degenerate faster. This can print a
Diffractive lens on to the flat side of lens .

This has been used for ages, especially in MEMS and integrated optics. Google "grey scale mask". It's usually done with reactive ion etch because you get very much better control that way.

This technology could be used for the curved lenses , laser crystals also.
B - Acid could be applied with the help of printer and small droplets
can form positive or negative small lenses or patterns.
C - Drop printer could be loaded with plastic - for example acrylic -
and droplets on lens could be hardened with UV. This technology
creates new possibilities. Droplets , pixels can be arranged for 3d or
2d patterns for to transfer the light with desired engineering.

Ink-jet technology for printing refractive surfaces is also far from new. It's just hard to make it work, since you have to control where the fluid goes after it lands--which is hard enough on paper, and really tough on smooth, curved glass or plastic. Ink jet dots are too large for writing holograms, even if you could control their positions accurately enough, and in order to make a smooth refractive surface, you have to let the dots coalesce--at which point all the fluid wants to flow together and drip off. Polishing just isn't that difficult.

I know microlithography and this stuff is to application on lenses
etc.

There's lots of room for innovation still, but you have to really understand the problem first.

Cheers,

Phil Hobbs
.

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