Membrane optics is a flat lens that employs plastic in place of glass to diffract rather than reflect or refract light. Concentric microscopic grooves etched into the plastic provide the diffraction. [1]
Glass transmits light with 90% efficiency, while membrane efficiencies range from 30 to 55%. Membrane thickness is on the order of that of plastic wrap. [1]
Applications
MOIRE program
DARPA plans to use membrane optics as part of its Membrane Optical Imager for Real-Time Exploitation (MOIRE) program. The program uses lightweight polymer membranes for a 20-meter (66 ft) foldable plastic orbital telescope capable of seeing a 1-meter (3 ft) object from 36,000 km (22,000 mi) away. Membrane grooves range from 4 to hundreds of micrometers in width. [1]
According to DARPA, glass-based optics in satellites are reaching the point where larger mirrors exceed the lifting power of existing rockets. The MOIRE devices is planned to be one-seventh the weight of a comparable glass-mirrored device. [1]
Individual membranes would be mounted on foldable metal petals. Once in geostationary orbit, the satellite would unfold. The membrane lens occupies one end and a sensor suite the other. [1]
The device would be the largest telescope ever built – twice the size of the ground-based twin 10-meter (33 ft) Keck telescopes. It could see about 40 percent of the Earth's surface and could image a 10 km × 10 km (6 mi × 6 mi) area at a 1-metre (3 ft) resolution and generate videos at one frame per second. [1]
A ground-based prototype consists of a section of a 5-meter (20 ft) wide device that created the first images with membrane optics. [1]
See also
References
External links
- MOIRE video on YouTube
- "2013/12/05 First Folding Space Telescope Aims to "Break the Glass Ceiling" of Traditional Designs". Darpa.mil. 2013-12-05. Archived from the original on 2013-12-08. Retrieved 2013-12-10.
- Nautilus Space Telescope
 | This optics-related article is a stub. You can help Wikipedia by expanding it. |
.png){kind=small} | This telescope-related article is a stub. You can help Wikipedia by expanding it. |
Membrane optics is a flat lens that employs plastic in place of glass to diffract rather than reflect or refract light. Concentric microscopic grooves etched into the plastic provide the diffraction. [1]
Glass transmits light with 90% efficiency, while membrane efficiencies range from 30 to 55%. Membrane thickness is on the order of that of plastic wrap. [1]
Applications
MOIRE program
DARPA plans to use membrane optics as part of its Membrane Optical Imager for Real-Time Exploitation (MOIRE) program. The program uses lightweight polymer membranes for a 20-meter (66 ft) foldable plastic orbital telescope capable of seeing a 1-meter (3 ft) object from 36,000 km (22,000 mi) away. Membrane grooves range from 4 to hundreds of micrometers in width. [1]
According to DARPA, glass-based optics in satellites are reaching the point where larger mirrors exceed the lifting power of existing rockets. The MOIRE devices is planned to be one-seventh the weight of a comparable glass-mirrored device. [1]
Individual membranes would be mounted on foldable metal petals. Once in geostationary orbit, the satellite would unfold. The membrane lens occupies one end and a sensor suite the other. [1]
The device would be the largest telescope ever built – twice the size of the ground-based twin 10-meter (33 ft) Keck telescopes. It could see about 40 percent of the Earth's surface and could image a 10 km × 10 km (6 mi × 6 mi) area at a 1-metre (3 ft) resolution and generate videos at one frame per second. [1]
A ground-based prototype consists of a section of a 5-meter (20 ft) wide device that created the first images with membrane optics. [1]
See also
References
External links
- MOIRE video on YouTube
- "2013/12/05 First Folding Space Telescope Aims to "Break the Glass Ceiling" of Traditional Designs". Darpa.mil. 2013-12-05. Archived from the original on 2013-12-08. Retrieved 2013-12-10.
- Nautilus Space Telescope
|
| This optics-related article is a stub. You can help Wikipedia by expanding it. |
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| This telescope-related article is a stub. You can help Wikipedia by expanding it. |