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ValeryD
Vendor (Aries)

Reged: 11/26/05

Loc: Kherson, Ukraine.

The apochromatic H-bomb has finally exploded!
#4776612 - 08/29/11 08:23 PM

August 29, 2011 at 16:00 local time (14:00 Greenvich), the apochromatic H-bomb has finally exploded!

An 8" F/6.5 apochromatic doubled objective, made of the very simplest glasses - F1 - K8 (F2 - BK7 Schott), has been successfully tested in the laboratory at the optical bench with 220mm F=2500 mirror collimator.

No visible false colors on a thin string of a bright lamp when looking through a 50x microscope instead of an eyepiece.

The doubled objective has a Diffraction Optical Element (DOE) at it's rear surface - a so called Freshnel lens.
Such a combo - two lenses + DOE, allows to nullify a chromatic aberration - inherent to achromatic objectives. Sphero-chromatic aberration is also nullified in such a system.

We expect a complete telescope tested under a real sky within 5-7 weeks.

Valery Deryuzhin.

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Patricko
Carpal Tunnel

Reged: 01/30/07

Loc: USA

Re: The apochromatic H-bomb has finally exploded! new

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[Re: ValeryD]
#4776627 - 08/29/11 08:33 PM

Interesting! Thanks for the info!

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jrbarnett
Eyepiece Hooligan

Reged: 02/28/06

Loc: Petaluma, CA

Re: The apochromatic H-bomb has finally exploded! new

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[Re: ValeryD]
#4776636 - 08/29/11 08:43 PM

Excellent Valery.

Best of luck on the field trials.

When you say "fresnel lens" do you mean stepped lenses similar to those used in lighthouses?

http://lighthousegetaway.com/lights/CA/bonita_fresnel.jpg

Regards,

Jim

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Scott Beith
SRF

Reged: 11/26/03

Loc: Frederick, MD

Re: The apochromatic H-bomb has finally exploded! new

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[Re: jrbarnett]
#4776637 - 08/29/11 08:45 PM

That is great news!

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chollman
sage

Reged: 04/24/08

Re: The apochromatic H-bomb has finally exploded! new

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[Re: Scott Beith]
#4776678 - 08/29/11 09:12 PM

Hmm.. A lens that corrects for both spherical and chromatic abberation using common glass would indeed be an H Bomb. An 8" F6.5 apo at a reasonable price could obsolete older designs. I understand that the Diffraction Optical Element is a recent patent by Japanese opticians. It does exist! I looked it up on line. A complicated read however. Look forward to hearing more of this.

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ValeryD
Vendor (Aries)

Reged: 11/26/05

Loc: Kherson, Ukraine.

Re: The apochromatic H-bomb has finally exploded! new

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[Re: jrbarnett]
#4776697 - 08/29/11 09:26 PM

Quote:

When you say "fresnel lens" do you mean stepped lenses similar to those used in lighthouses?

Regards,

Jim

Yes, Jim, the princip is the same. But our stepper "lenses" are many many times finer and tinier, specially calculated and then specially and very precisely engraved on the rear surface. The process of an engraving is the key of this new technology. It tooks several years to develop it up to the level of execution suitable for astronomical diffraction limited optics.
The engraving itself tooks only several hours - less than polishing of the lenses. But all preparations and "trial and error" attepts took several years. The "pregnancy" of the second objective will not lasts more, than some weeks, I hope. And further all is shorter.

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JimP
Pooh-Bah

Reged: 04/22/03

Loc: South Carolina

Re: The apochromatic H-bomb has finally exploded! new

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[Re: ValeryD]
#4776733 - 08/29/11 09:49 PM

Excellent Valery! Good Luck!!

Jim Phillips

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cloud_cover
sage

Reged: 08/17/10

Loc: Restaurant at the End of the U...

Re: The apochromatic H-bomb has finally exploded! new

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[Re: JimP]
#4776741 - 08/29/11 09:52 PM

Wow!
just curious: How much do you expect this to cost when it finally does go into production?

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KWB
Postmaster

Reged: 09/30/06

Loc: Westminster,Co Elev.5400 feet

Re: The apochromatic H-bomb has finally exploded! new

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[Re: cloud_cover]
#4776805 - 08/29/11 10:19 PM

I'd love to know if this same design is being considered in smaller aperture sizes in the near future as well?

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Simoes Pedro
sage

Reged: 02/03/09

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[Re: KWB]
#4776820 - 08/29/11 10:24 PM

A freshnel element will reduce the resolution of the lens. Where it reads "diffraction limited", it ought to read "diffraction limited equivalent to a x inches clear apperture lens".

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jrbarnett
Eyepiece Hooligan

Reged: 02/28/06

Loc: Petaluma, CA

Re: The apochromatic H-bomb has finally exploded! new

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[Re: ValeryD]
#4776865 - 08/29/11 10:43 PM

Valery:

If you pull this off commercially, you will be the stuff of legend!

You may want to consider applying for US and/or other country patents on the design prior to publicly disclosing prototypes.

Inventors should be rewarded for their innovations, IMO.

Regards,

Jim

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GeneT
Ely Kid

Reged: 11/07/08

Loc: South Texas

Re: The apochromatic H-bomb has finally exploded! new

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[Re: ValeryD]
#4776887 - 08/29/11 10:50 PM

Looking forward to your updates!

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Yuri
Vendor - (Telescope Engineering Company)

Reged: 04/22/09

Loc: Colorado

Re: The apochromatic H-bomb has finally exploded! new

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[Re: GeneT]
#4776925 - 08/29/11 11:03 PM

Congratulations Valery for the light in the end of 7-years long tunnel!
I understand about colors, but how was the scatter, if any?
Yuri

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Starhawk
Post Laureate

Reged: 09/16/08

Loc: Tucson, Arizona

Re: The apochromatic H-bomb has finally exploded! new

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[Re: Yuri]
#4777087 - 08/30/11 12:08 AM

Valery,

You must know this was coming:

THIS POST IS WORTHLESS WITHOUT PHOTOS!

-Rich

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jmiele
Patron Saint?

Reged: 12/04/10

Re: The apochromatic H-bomb has finally exploded! new

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[Re: Starhawk]
#4777089 - 08/30/11 12:10 AM

Valery, Congratulations on this triumph .Keep us posted and tell me were the line starts.

Joe

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Rustynuts
super member

Reged: 07/25/11

Loc: East Tennessee

Re: The apochromatic H-bomb has finally exploded! new

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[Re: jmiele]
#4777134 - 08/30/11 12:38 AM

so, does this mean I need to sell my 228 triplet before it's value drops by half?

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orlyandico
Carpal Tunnel

Reged: 08/10/09

Loc: Singapore

Re: The apochromatic H-bomb has finally exploded! new

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[Re: Rustynuts]
#4777179 - 08/30/11 01:01 AM

hi guys

I know that diffractive optics is not new, however before we all jump up and down, something to think about.. according to this review (and there are many corroborating ones) the CONTRAST of the Canon DO L lens (note: this is an extremely expensive, $6000+ lens, not some low-end stuff) is less than conventional lenses.

http://www.the-digital-picture.com/Reviews/Canon-EF-400mm-f-4.0-DO-IS-USM-Lens-Review.aspx

"Contrast is the Canon EF 400mm f/4.0 DO IS USM Lens' optical shortcoming - which also hurts the apparent sharpness performance. I found that most of my shots needed a healthy contrast boost in post-processing (or a positive in-camera contrast setting). I could easily tell which image was taken with the 400 DO when looking at comparative shots on a monitor. The 300 f/2.8 IS has much better contrast than the 400 DO. Even the Canon 100-400mm L has better contrast when the vignetting in the full frame corners at 400mm does not get in the way. Low contrast is my most-significant disapointment with the 400 DO - fortunately it is something that post-processing can help."

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Rossmon
sage

Reged: 07/09/10

Loc: Marin County, CA

Re: The apochromatic H-bomb has finally exploded! new

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[Re: orlyandico]
#4777258 - 08/30/11 02:18 AM

I don't care if new technology is simpler and or cheaper to make, it will probably cost more or the same!

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ValeryD
Vendor (Aries)

Reged: 11/26/05

Loc: Kherson, Ukraine.

Re: The apochromatic H-bomb has finally exploded! new

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[Re: orlyandico]
#4777268 - 08/30/11 02:31 AM

Quote:

hi guys

I know that diffractive optics is not new, however before we all jump up and down, something to think about.. according to this review (and there are many corroborating ones) the CONTRAST of the Canon DO L lens (note: this is an extremely expensive, $6000+ lens, not some low-end stuff) is less than conventional lenses.

http://www.the-digital-picture.com/Reviews/Canon-EF-400mm-f-4.0-DO-IS-USM-Lens-Review.aspx

"Contrast is the Canon EF 400mm f/4.0 DO IS USM Lens' optical shortcoming - which also hurts the apparent sharpness performance. I found that most of my shots needed a healthy contrast boost in post-processing (or a positive in-camera contrast setting). I could easily tell which image was taken with the 400 DO when looking at comparative shots on a monitor. The 300 f/2.8 IS has much better contrast than the 400 DO. Even the Canon 100-400mm L has better contrast when the vignetting in the full frame corners at 400mm does not get in the way. Low contrast is my most-significant disapointment with the 400 DO - fortunately it is something that post-processing can help."

orlyandico,

You, guy, may be thinking that we all, at the ARIES, and me in particular, are novices and never heard and never seen all these DO elements in Canon lenses? Yes? You are perfectly mistaken!
OK, you can relax now. On a light source like a lazer pinpoint "star" in a double pass autocollimator, on almost black background we see no more scattered light than were seen when tested our 10" Maks.

Valery.

Edited by hfjacinto (08/30/11 10:18 AM)

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ValeryD
Vendor (Aries)

Reged: 11/26/05

Loc: Kherson, Ukraine.

Re: The apochromatic H-bomb has finally exploded! new

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[Re: Starhawk]
#4777272 - 08/30/11 02:39 AM

Quote:

Valery,

You must know this was coming:

THIS POST IS WORTHLESS WITHOUT PHOTOS!

-Rich

I know, that for some guys this is true. But for thouse, who know me, my info in words is enough. In the same time I know well, that illustrations are worth thousand of words.
But wait a bit longer. You will see all necessary pictures.

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