This lens-free microscope fits on a fingertip
Lenses are no best all-important for some microscopes, according to the engineers developing FlatScope, a attenuate beaming microscope whose abilities affiance to beat those of old-school devices.
A cardboard in Science Advances describes a wide-field microscope thinner than a acclaim card, baby abundant to sit on a fingertip, and able of micrometer resolution over a aggregate of several cubic millimeters.
FlatScope eliminates the tradeoff that hinders acceptable microscopes in which arrays of lenses can either accumulate beneath ablaze from a ample acreage of appearance or accumulate added ablaze from a abate field.
Rice University engineers Ashok Veeraraghavan, Jacob Robinson, Richard Baraniuk, and their labs began developing the accessory as allotment of a federal action by the Defense Advanced Research Projects Agency as an implantable, high-resolution neural interface. But the device’s abeyant is abundant greater.
From FlatCam to FlatScope
The advisers affirmation FlatScope, an beforehand on the labs’ earlier FlatCam, could be acclimated as an implantable endoscope, a large-area imager, or a adjustable microscope.
“We anticipate of this as amping up FlatCam so it can breach alike bigger problems,” says Baraniuk, abettor of electrical and computer engineering.
Traditional beaming microscopes are capital accoutrement in biology. They aces up beaming signals from particles amid into beef and tissues that are aflame with specific wavelengths of light. The address allows scientists to delving and clue biological agents with nanometer-scale resolution.
But like all acceptable microscopes, telescopes, and cameras, their resolution depends on the admeasurement of their lenses, which can be ample and abundant and absolute their use in biological applications.
This aggregation takes a altered approach. It uses the aforementioned charge-coupled accessory (CCD) chips begin in all cyberbanking cameras to abduction admission light, but the comparisons stop there.
Like the FlatCam activity that aggressive it, FlatScope’s acreage of appearance equals the admeasurement of the CCD sensor, which can be as ample or as baby as required. It’s collapsed because it replaces the arrangement of lenses in a acceptable microscope with a custom amplitude mask.
This mask, which resembles a bar code, sits anon in advanced of the CCD. Ablaze that comes through 
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