#anastigmat

[alanyahnke]

Steamers At The Downsville Coffee House - July 22,2011 by Alan Yahnke Via Flickr: 1951 4x5 Graflex Crown Graphic - 1939 135mm Kodak Anastigmat Lens - Compur Shutter - Expired Kodak Portra 160nc negative film scanned on an Epson V750 scanner

[spacetimewithstuartgary]

Work is underway on NASA's next-generation asteroid hunter

The mirrors for NASA's Near-Earth Object Surveyor space telescope are being installed and aligned, and work on other spacecraft components is accelerating.

NASA's new asteroid-hunting spacecraft is taking shape at NASA's Jet Propulsion Laboratory in Southern California. Called NEO Surveyor (Near-Earth Object Surveyor), this cutting-edge infrared space telescope will seek out the hardest-to-find asteroids and comets that might pose a hazard to our planet. In fact, it is the agency's first space telescope designed specifically for planetary defense.

Targeting launch in late 2027, the spacecraft will travel a million miles to a region of gravitational stability—called the L1 Lagrange point—between Earth and the sun. From there, its large sunshade will block the glare and heat of sunlight, allowing the mission to discover and track near-Earth objects as they approach Earth from the direction of the sun, which is difficult for other observatories to do. The space telescope also may reveal asteroids called Earth Trojans, which lead and trail our planet's orbit and are difficult to see from the ground or from Earth orbit.

NEO Surveyor relies on cutting-edge detectors that observe two bands of infrared light, which is invisible to the human eye. Near-Earth objects, no matter how dark, glow brightly in infrared as the sun heats them. Because of this, the telescope will be able to find dark asteroids and comets, which don't reflect much visible light. It also will measure those objects, a challenging task for visible-light telescopes that have a hard time distinguishing between small, highly reflective objects and large, dark ones.

"NEO Surveyor is optimized to help us to do one specific thing: enable humanity to find the most hazardous asteroids and comets far enough in advance so we can do something about them," said Amy Mainzer, survey director for NEO Surveyor and a professor at the University of California, Los Angeles. "We aim to build a spacecraft that can find, track, and characterize the objects with the greatest chance of hitting Earth. In the process, we will learn a lot about their origins and evolution."

Coming into focus

The spacecraft's only instrument is its telescope. About the size of a washer-and-dryer set, the telescope's blocky aluminum body, called the optical bench, was built in a JPL clean room. Known as a three-mirror anastigmat telescope, it will rely on curved mirrors to focus light onto its infrared detectors in such a way that minimizes optical aberrations.

"We have been carefully managing the fabrication of the spacecraft's telescope mirrors, all of which were received in the JPL clean room by July," said Brian Monacelli, principal optical engineer at JPL. "Its mirrors were shaped and polished from solid aluminum using a diamond-turning machine. Each exceeds the mission's performance requirements."

Monacelli inspected the mirror surfaces for debris and damage, then JPL's team of optomechanical technicians and engineers attached the mirrors to the telescope's optical bench in August. Next, they will measure the telescope's performance and align its mirrors.

Complementing the mirror assembly are the telescope's mercury-cadmium-telluride detectors, which are similar to the detectors used by NASA's recently retired NEOWISE (short for Near-Earth Object Wide-field Infrared Survey Explorer) mission.

An advantage of these detectors is that they don't necessarily require cryogenic coolers or cryogens to lower their operational temperatures in order to detect infrared wavelengths. Cryocoolers and cryogens can limit the lifespan of a spacecraft.

NEO Surveyor will instead keep its cool by using its large sunshade to block sunlight from heating the telescope and by occupying an orbit beyond that of the moon, minimizing heating from Earth.

The telescope will eventually be installed inside the spacecraft's instrument enclosure, which is being assembled in JPL's historic High Bay 1 clean room where NASA missions such as Voyager, Cassini, and Perseverance were constructed. Fabricated from dark composite material that allows heat to escape, the enclosure will help keep the telescope cool and prevent its own heat from obscuring observations.

Once it is completed in coming weeks, the enclosure will be tested to make sure it can withstand the rigors of space exploration. Then it will be mounted on the back of the sunshade and atop the electronic systems that will power and control the spacecraft.

"The entire team has been working hard for a long time to get to this point, and we are excited to see the hardware coming together with contributions from our institutional and industrial collaborators from across the country," said Tom Hoffman, NEO Surveyor's project manager at JPL.

"From the panels and cables for the instrument enclosure to the detectors and mirrors for the telescope—as well as components to build the spacecraft—hardware is being fabricated, delivered, and assembled to build this incredible observatory."

IMAGE: This artist’s concept depicts NASA’s NEO Surveyor in deep space. The black-paneled angular structure in the belly of the spacecraft is the instrument enclosure that is being built at JPL. The mission’s infrared telescope will be installed inside the enclosure. Credit: NASA/JPL-Caltech

[blu27nature]

Zeiss Ikon Nettar 517/16 (Novar Anastigmat f6.3/75mm) Ilford XP2 Super 400, Rodinal 1:100 (1h stand development)

[garyquayphotography]

“Chanticleer Point, November 2012.”

©2012 Gary L. Quay

The clouds were finally cooperating on one fine Tuesday in 2012. There are so many times when we have either total overcast, or blank, cloudless skies. At least, this seems to be the case when I have an opportunity to get out and take some pictures.

I used my 8" Cooke Anastigmat for this picture. I wanted to see how uncoated optics would render the clouds. They required a little burning in, but otherwise, they turned out just fine. It may have helped that I used a red filter.

The name reflects historic name for the viewpoint from which I took this picture. The subject of the image is Crown Point.

Camera: Senaca Camera City View 5x7.

Lens: 8" Cooke Anastigmat.

Film: Arista.edu 100 developed in 510 Pyro.

[calleryphoto]

Snap 📸

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🪬 @calleryphoto

📍 Central & Western , Hong Kong

🗓 2022

📷 Halina AI Twin Lens Reflex

🔭 Halina Anastigmat 80mm f/3.5

🧪 @megatoni_production

🎞 FujiChrome Velvia 100

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[minim]

argus ANASTIGMAT

[squirls1025]

Check out this listing I just added to my Poshmark closet: Ricoh Riken F3.5 twin-lens Film Camera Leather Case Anastigmat Japan No 551424.

[pocketsrestorations]

Check out this listing I just added to my Poshmark closet: Vintage Argus C-3 The Brick Rangefinder 35mm Camera F3.5 50mm with Case Untested.

[alexmmx]

Presidio Woods - 1979 San Francisco Here is a section that is near The Toll Plaza but it is located in the West side of the Bridge, as there are trails that will lead you to the Beach, But for me I was taking photos near the trees that meet with the Sand Dunes near the Gun Emplacements. as the roots dug down into the sand. Camera - A 1933 Kodak Recomar18 120 Camera with a 105mm F/4.5 Anastigmat Lens Film - Ilford FP4 125 B/W 120 film

[alanyahnke]

Old Favorite On D (B and W) by Alan Yahnke Via Flickr: 1937 Zeiss Ikon 515/16 - 1:6.3 F=7.5 cm Netter Anastigmat Lens -Telma Shutter - Expired Kodak Portra 160nc - Epson V750 Scanner

[666blackpanther]

愛すべきブリテン野郎たちの為に遠い国からやってきました

DALLMEYERのENLARGINGレンズ

DALLMEYER ENLARGING ANASTIGMAT 4 2/1in F4.5

[rich4you]

Check out this listing I just added to my Poshmark closet: Antique Rare Folding Camera Vario Anastigmat Traioplan 1:6.8 F=135 mm Mayer Goer.

[spacetimewithstuartgary]

Work Is Under Way on NASA’s Next-Generation Asteroid Hunter

The mirrors for NASA’s Near-Earth Object Surveyor space telescope are being installed and aligned, and work on other spacecraft components is accelerating.

NASA’s new asteroid-hunting spacecraft is taking shape at NASA’s Jet Propulsion Laboratory in Southern California. Called NEO Surveyor (Near-Earth Object Surveyor), this cutting-edge infrared space telescope will seek out the hardest-to-find asteroids and comets that might pose a hazard to our planet. In fact, it is the agency’s first space telescope designed specifically for planetary defense.

Targeting launch in late 2027, the spacecraft will travel a million miles to a region of gravitational stability — called the L1 Lagrange point — between Earth and the Sun. From there, its large sunshade will block the glare and heat of sunlight, allowing the mission to discover and track near-Earth objects as they approach Earth from the direction of the Sun, which is difficult for other observatories to do. The space telescope also may reveal asteroids called Earth Trojans, which lead and trail our planet’s orbit and are difficult to see from the ground or from Earth orbit.

NEO Surveyor relies on cutting-edge detectors that observe two bands of infrared light, which is invisible to the human eye. Near-Earth objects, no matter how dark, glow brightly in infrared as the Sun heats them. Because of this, the telescope will be able to find dark asteroids and comets, which don’t reflect much visible light. It also will measure those objects, a challenging task for visible-light telescopes that have a hard time distinguishing between small, highly reflective objects and large, dark ones.

“NEO Surveyor is optimized to help us to do one specific thing: enable humanity to find the most hazardous asteroids and comets far enough in advance so we can do something about them,” said Amy Mainzer, survey director for NEO Surveyor and a professor at the University of California, Los Angeles. “We aim to build a spacecraft that can find, track, and characterize the objects with the greatest chance of hitting Earth. In the process, we will learn a lot about their origins and evolution.”

Coming Into Focus

The spacecraft’s only instrument is its telescope. About the size of a washer-and-dryer set, the telescope’s blocky aluminum body, called the optical bench, was built in a JPL clean room. Known as a three-mirror anastigmat telescope, it will rely on curved mirrors to focus light onto its infrared detectors in such a way that minimizes optical aberrations.

“We have been carefully managing the fabrication of the spacecraft’s telescope mirrors, all of which were received in the JPL clean room by July,” said Brian Monacelli, principal optical engineer at JPL. “Its mirrors were shaped and polished from solid aluminum using a diamond-turning machine. Each exceeds the mission’s performance requirements.”

Monacelli inspected the mirror surfaces for debris and damage, then JPL’s team of optomechanical technicians and engineers attached the mirrors to the telescope’s optical bench in August. Next, they will measure the telescope’s performance and align its mirrors.

Complementing the mirror assembly are the telescope’s mercury-cadmium-telluride detectors, which are similar to the detectors used by NASA’s recently retired NEOWISE (short for Near-Earth Object Wide-field Infrared Survey Explorer) mission. An advantage of these detectors is that they don’t necessarily require cryogenic coolers or cryogens to lower their operational temperatures in order to detect infrared wavelengths. Cryocoolers and cryogens can limit the lifespan of a spacecraft. NEO Surveyor will instead keep its cool by using its large sunshade to block sunlight from heating the telescope and by occupying an orbit beyond that of the Moon, minimizing heating from Earth.

The telescope will eventually be installed inside the spacecraft’s instrument enclosure, which is being assembled in JPL’s historic High Bay 1 clean room where NASA missions such as Voyager, Cassini, and Perseverance were constructed. Fabricated from dark composite material that allows heat to escape, the enclosure will help keep the telescope cool and prevent its own heat from obscuring observations.

Once it is completed in coming weeks, the enclosure will be tested to make sure it can withstand the rigors of space exploration. Then it will be mounted on the back of the sunshade and atop the electronic systems that will power and control the spacecraft.

“The entire team has been working hard for a long time to get to this point, and we are excited to see the hardware coming together with contributions from our institutional and industrial collaborators from across the country,” said Tom Hoffman, NEO Surveyor’s project manager at JPL. “From the panels and cables for the instrument enclosure to the detectors and mirrors for the telescope — as well as components to build the spacecraft — hardware is being fabricated, delivered, and assembled to build this incredible observatory.”

More About NEO Surveyor

The NEO Surveyor mission marks a major step for NASA toward reaching its U.S. Congress-mandated goal to discover and characterize at least 90% of the near-Earth objects more than 460 feet (140 meters) across that come within 30 million miles (48 million kilometers) of our planet’s orbit. Objects of this size can cause significant regional damage, or worse, should they impact the Earth.

The mission is tasked by NASA’s Planetary Science Division within the Science Mission Directorate; program oversight is provided by the Planetary Defense Coordination Office, which was established in 2016 to manage the agency’s ongoing efforts in planetary defense. NASA’s Planetary Missions Program Office at the agency’s Marshall Space Flight Center provides program management for NEO Surveyor.

The project is being developed by JPL and is led by survey director Amy Mainzer at UCLA. Established aerospace and engineering companies have been contracted to build the spacecraft and its instrumentation, including BAE Systems, Space Dynamics Laboratory, and Teledyne. The Laboratory for Atmospheric and Space Physics at the University of Colorado, Boulder will support operations, and IPAC-Caltech in Pasadena, California, is responsible for processing survey data and producing the mission’s data products. Caltech manages JPL for NASA.

[blu27nature]

Pastor por um dia Zeiss Ikon Nettar 517/16 (Novar Anastigmat f6.3/75mm) Ilford XP2 Super 400, Rodinal 1:100 (1 hour stand development) Tumblr - Instagram

[neilkesterson]

Out of Line by Neil Kesterson Via Flickr: Bolsey B2, Wollensak 3.2/44mm Anastigmat, Fomapan 400, Caffenol

[calleryphoto]

🚃🪞

•

🪬 @calleryphoto

📍 Yuen Long, Hong Kong

🗓 2022

📷 Halina AI Twin Lens Reflex

🔭 Halina Anastigmat 80mm f/3.5

🎞 Kodak Ektachrome E100

🖨 Panasonic LUMIX S1, Canon EF 100mm f2.8L Macro IS USM

💻 Lightroom

• Handheld

•

Social:

IG. FB. VERO. Twitter. Flickr. Tumblr. Pinterest: CalleryPhoto