Sheeting with composite image that floats
A technique for synthesizing images and thin slices, which is applied in the fields of instruments, optics, stereo photography, etc.
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Examples
example 1
[0087] This example depicts an embedded lens sheet with a layer of aluminum material, and a composite image that appears to float above the sheet. use for Figure 14 Light pulses of the type described in to form floating images. Optical pulses including SpectraPhysics Quanta-Ray TM DCR-2(10)Nd:YAG laser 300, which operates in a Q-switched mode with a fundamental wavelength of 1.06 microns. The pulse width of this laser is usually from 10-30ns. After the laser, energy is redirected by a 99% reflective rotating mirror 302, a basic glass diffuser 304, a 5X beam expansion telescope 306, and an aspheric lens 308 with a numerical aperture of 0.64 and a focal length of 39.0 mm. Light from aspheric lens 308 is directed to XYZ stage 310 . The stage consists of three linear stages and is available under designation ATS50060 from Aerotech Corporation of Pittsburgh, PA. One linear stage is used to move the aspheric lens along the axis (Z-axis) between the aspheric focal point and th...
example 2
[0093] In this example, an exposed lens flake structure with a transparent specular radiation sensitive layer is used to form a composite image that appears to float beneath the microlens flake. The light pulses used in Example 1 can also be used in this example. The microlens flakes are placed relative to the aspheric lens 308 such that the lenses nearly touch the microlens flakes. Adjust the laser output to get about 14mJ / cm directly under the aspheric lens 2 of irradiation. An exposed lens lamella consisting of partially embedded microlenses as described in US Patent No. 3,801,183 has a zinc sulfide (ZnS) insulating mirror vapor deposited onto one side of the microlenses. The thickness of the ZnS layer is typically 560 nm. As in Example 1, the laser operating at 10 Hz resulted in the formation of continuous synthetic lines in the microlens sheet when the sheet was moved at 50.8 cm / min. The platform system traces a "sphere" pattern (a circle with four inscribed arcs).
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example 3
[0096] This example describes a composite image formed using a lens array instead of a single aspheric lens in an exposed lens lamella with an aluminum radiation sensitive layer. use for Figure 15 Light pulses as described in to form floating composite images. The optical pulse includes a Q-switched laser 300 , a 99% mirror 302 , an optical scatterer 304 , and a beam expanding telescope 306 . The optical pulse elements used in this example were the same as those described in Example 1. The light pulse in this example also includes a two-dimensional lens array 407 , a reflective mask 409 and a negative biconcave lens 411 . The areas of the reflective mask 409 are transparent, coinciding with the areas of the microlens material 412 that will be exposed to laser radiation, while the remaining surface of the mask is opaque or reflective.
[0097] Lens array 407 comprises a fused silicon refractive microlens array available from MEMs Optics, LLC, of Huntsville, Ala., under th...
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Abstract
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