Microscopy imaging
View Patent ↗Among other things, an imaging device has a photosensitive array of pixels, and a surface associated with the array is configured to receive a specimen with at least a part of the specimen at a distance from the surface equivalent to less than about half of an average width of the pixels.
1. An apparatus comprising:
an imaging device comprising a two-dimensional array of pixels at a photosensitive surface, the imaging device being configured to have a specimen stationary, in contact with the photosensitive surface, and within a specimen space adjacent the photosensitive surface,
a cover having a cover surface,
a light source, and
a housing structure supporting the imaging device, the cover, and the light source and configurable back and forth between at least two different configurations including
one configuration in which (a) the cover surface (i) is supported parallel to and facing the photosensitive surface to define a chamber height and to contain a specimen within a near-field distance of the photosensitive surface, and (ii) is configured to restrict the specimen space, and (b) when the light source is active, light from the light source can reach the specimen and the photosensitive surface through the cover surface, and
another configuration in which (a) the cover surface is supported at a second height greater than the chamber height from the photosensitive surface, so that (b) the photosensitive surface is exposed to receive placement of the specimen directly onto the photosensitive surface, and
electronics to cause the imaging device to capture, at one time, information representing a two-dimensional image of the stationary specimen in contact with the photosensitive surface.
2. The apparatus of claim 1 in which the housing structure comprises a hinge rotatable to pivot the housing structure between the at least two different configurations.
3. The apparatus of claim 1 in which the cover is partially transmissive to light.
4. The apparatus of claim 1 in which the cover comprises glass or polystyrene.
5. The apparatus of claim 1 in which the cover is 0.5 to 5 mm thick.
6. The apparatus of claim 1 comprising a gap between the cover and the photosensitive surface, the gap being less than 1 mm.
7. The apparatus of claim 1 comprising a gap between the cover and the photosensitive surface, the gap being between 1 micron and 250 microns.
8. The apparatus of claim 1 in which the imaging device comprises an imaging integrated circuit attached to a headboard and the headboard is attached to circuitry on a mounting block.
9. The apparatus of claim 1 in which the photosensitive surface is free of a protective window.
10. The apparatus of claim 1 in which the imaging device has a resolution smaller than 1 micrometer.
11. The apparatus of claim 1 in which the imaging device has a resolution smaller than 0.5 micrometer.
12. The apparatus of claim 1 in which the housing structure comprises a lid and a bottom, the imaging device being mounted on the bottom, the light source being mounted on the lid.
13. The apparatus of claim 1 comprising a light-collecting layer between the specimen and the photosensitive surface.
14. The apparatus of claim 13 in which the light-collecting layer comprises a pixel-by-pixel array.
15. The apparatus of claim 13 in which the light-collecting layer has a thickness such that a near-field criterion is satisfied for the specimen and the imaging device.
16. The apparatus of claim 13 in which the light-collecting layer comprises a pixel-by-pixel array of microlenses.
17. The apparatus of claim 16 in which the microlenses comprise a dielectric material.
18. The apparatus of claim 13 in which the light-collecting layer comprises an insulating material.
19. The apparatus of claim 18 in which the material comprises an oxide.
20. The apparatus of claim 18 in which the material comprises a nitride.
21. The apparatus of claim 18 in which the material comprises a fluoride.
22. The apparatus of claim 18 in which the material comprises an oxynitride.
23. The apparatus of claim 13 in which the light-collecting layer comprises a thin-film optical filter.
24. The apparatus of claim 1 in which the light source emits light primarily in the ultraviolet wavelength band and in which longer-wavelength fluorescence or phosphorescence of the specimen produces a light signal to which the array of pixels is sensitive.
25. The apparatus of claim 1 in which the light source provides collimated light.
26. The apparatus of claim 25 comprising one or more chamber lid electrodes contacting the cover surface.
27. The apparatus of claim 26 comprising a conductive layer functioning as one or more surface electrodes, the conductive layer between specimen and the photosensitive surface.
28. The apparatus of claim 27 comprising wires electrically connecting the one or more surface electrodes and the one or more chamber lid electrodes to a potential-applying device.
29. The apparatus of claim 1 in which the cover is partially transmissive to light.
30. The apparatus of claim 1 comprising a fluid channel to deliver the specimen.
31. The apparatus of claim 30 comprising a second fluid channel to extract the specimen.