Zernike phase rings are used for phase contrast imaging along with our zone plates to achieve high resolution, high-contrast imaging of biological and other samples. Rings of varying materials, thickness and diameters are available custom-made for your application. Materials Phase rings of varying materials and thickness can be made on thin membranes for your application. Contact us for more information. Custom Designs Custom designs with multiple phase rings on a single membrane can be made to test different parameters. Membranes Phase rings can be fabricated on various ultra-thin membranes of silicon nitride, silicon carbide, and silicon from 50 nm to 1 µm in thickness for soft to hard X-rays. Chip Sizes Custom chip sizes can be made. Our typical substrate size is 5 mm x 5 mm, but custom sizing is possible.
X-rays below 5 keV (<~0.25 nm) are typically classified as soft X-rays, where they are more readily absorbed than higher energy X-rays. Typically, zone plates do not require the same thickness for efficiency and allow for higher resolution imaging. A range of zone plate options for soft/tender X-Rays are available for specific requirements. (Custom Designs Available) Device | Outer Zone Width ΔR n (nm) | Thickness (µm) | Outer Diameter (µm) | ( of zones) E/ΔE Limit | ~ Focal Length(µm) SZP‑90um‑15nm | 15 | <0.07 | 90 | 1514 | 325 SZP‑120um‑15nm | 120 | 2019 | 433 SZP‑200um‑18nm | 18 | <0.15 | 200 | 2797 | 868 SZP‑270um‑18nm | 270 | 3775 | 1172 SZP‑320um‑18nm | 320 | 4473 | 1389 SZP-200um-25nm | 25 | <0.24 | 200 | 2007 | 1207 SZP‑250um‑25nm | 250 | 2509 | 1510 SZP-300um-25nm | 300 | 3010 | 1811 SZP-360um-25nm | 360 | 3612 | 2173 TZP‑160um‑50nm | 50 | <0.75 | 160 | 801 | 1934 TZP‑280um‑50nm | 280 | 1401 | 3384 TZP‑750um‑200nm | 200 | <0.75 | 750 | 938 | 36292 TZP‑1250um‑200nm | 1250 | 1563 | 60487 For estimated efficiency of zone plate, please see our online calculator at www.appliednt.com/zpcalc
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Zone plate efficiency for binary zone plates requires high aspect ratio structures which can survive high flux imaging systems. The “Oxide Interlock” option creates small interconnecting channels between metal zone of silicon dioxide which is transparent to hard X-rays and does not swell or distort, even when not under vacuum. These have been shown to significantly increase the zone plate efficiency and lifetime.
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Our standard frame size is 5 mm x 5 mm. We also offer custom frame sizes. Membrane thickness can be down to 50 nm and silicon carbide membranes are available for those requiring long-lifetime membranes. Low stress 50 nm silicon nitride membrane Low stress 200 nm silicon carbide membrane Fused Silica Substrate (~500 um thick) Custom chip sizes
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