HOME >> BIOLOGY >> NEWS
New Machine Slashes Time, Cost To Make Unique Lenses

ed circuits on wafers of silicon.

"Aspheres are better than spherical lenses in these applications because they bend light rays more precisely," says President Donald Golini of Rochester optics firm QED Technologies, which was not part of the consortium that developed the asphere grinder.

An aspherical lens or mirror focuses incoming rays to a single point, while spherical lenses cause blurring. "For example," says Golini, "if you were to build a reflective telescope with a spherical primary mirror, and use it to look at a star far away, the starlight striking the edge of the mirror would focus at a different spot than the light striking the mirror's center. You'd actually need additional corrective optics to reduce this aberration, which is normally avoided altogether in telescopes through the use of aspheric mirrors."

Since it focuses light more precisely, a single asphere can take the place of two or more spherical elements in many optical devices, such as night-vision goggles worn by soldiers. Replacing bulky groupings of three or four spherical lenses with an asphere or two would make the goggles 30 percent smaller and lighter, Pollicove says, while also boosting image quality and resolution.

But aspheres' subtly irregular curves make them a real chore to produce. Most of today's manufacturers use a process Golini describes as "home-grown," rigging up expensive machines like high-precision lathes for double-duty as asphere grinders. The final painstaking round of hand-smoothing, known as "lapping," done by specialized artisans, can take hours or even days. "There's now no efficient way, and certainly no single machine, for making high-precision ground aspheres from start to finish," Golini says.

Many companies sidestep these difficulties by using mass- produced molded plastic or small glass aspheres in their optical products. But plastic aspheres are susceptible to heat and humidity, and molding limits their glass counter
'"/>

Contact: Steve Bradt
sbradt@admin.rochester.edu
716-273-4726
University of Rochester
7-May-1998


Page: 1 2 3 4

Related biology news :

1. Darwins Time Machine: Scientists begin predicting evolutions next step
2. Porous Silicon Joining Humans To Machines
3. Whitehead Receives $7 million NIH Grant To Build High-Speed Sequencing Machines
4. New Insights Into The Transport Machinery Of The Cell: A Single Protein Substitutes The Regulatory Machinery Specifying Endosome Fusion In Vitro
5. NIST Machine To Aid In Making Better Artificial Joints
6. Crystal Structure Of The Archaeal Chaperonin Thermosome, A Protein-Folding Machine, Determined
7. Prostate Cancer Switch May Yield Map Of Cancer Machinery, Targets For Drugs
8. Insights Into The Proteasome - A Fascinating Macromolecular Machine For Protein Degradation
9. Cooking And Salad Oils Could Lubricate Cars, Boats, Machines
10. Unique partnership between UH, FDA opens path for scientific exchange
11. Unique two-part macroemulsion offers new approach to cleaning up contaminated aquifers

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:9/3/2020)... ... September 03, 2020 , ... ... announced that an extensive third-party assessment of the company’s security practices has been ... against federal security regulations. The comprehensive evaluation reviewed Litmus’ processes and systems, assessing ...
(Date:8/23/2020)... , ... August 21, 2020 , ... ... Corporation has been published and is now available on the company’s global ... diffraction—serves the X-ray analysis community, presenting current news and crystallographic research. , ...
(Date:8/12/2020)... , ... August 11, 2020 , ... ... based in Princeton, NJ, have entered into license agreements with Housey Pharma’s HMI ... Both Roche and J&J have annual Research and Development spending in excess ...
Breaking Biology News(10 mins):
(Date:8/12/2020)... ... August 12, 2020 , ... Inc. magazine ... global leader in FDA compliance consulting has been named on its annual Inc. ... list represents a unique look at the most successful companies within the American ...
(Date:7/31/2020)... STATION, Texas (PRWEB) , ... July 29, 2020 ... ... cleanroom solutions today announced the launch of its new tagline, “BUILDING FOR LIFE.” ... the biopharmaceutical industry and around the globe, requiring fast track capacity to provide ...
(Date:7/31/2020)... ... , ... The SDX® Respiratory Gating System , trusted ... its 20th anniversary of worldwide use. Introduced in the US over the past ... of Pennsylvania, University of Michigan, University of Maryland, University of California San Francisco—and ...
(Date:7/18/2020)... ... July 16, 2020 , ... Medial EarlySign , a ... prevention of high-burden diseases, and Centric Consulting, a business and technology consulting firm, ... existing data in order to identify and prioritize patients for care. , Combining ...
Breaking Biology Technology:
Cached News: