Distorted Dammann grating

Abstract

We introduce the Dammann phase-encoding method into original distorted gratings and propose a modified distorted grating, called a distorted Dammann grating (DDG), to realize multiplane imaging of several tens of layers within the object field onto a single image plane. This property implies that the DDG makes it possible to achieve simultaneously high axial resolving power and large axial imaging range without scanning. This DDG should be of high interest for its potential applications in real-time three-dimensional optical imaging and tracking. Multiplane imaging of 7×7 object layers onto a single camera plane is experimentally demonstrated using a 7×7 DDG for an objective of NA=0.127.

Conformable Holographic Photonic Ink Sensors Based on Adhesive Tapes for Strain Measurements

“…The diffraction was asymmetric with one side diffraction intensity being higher in the first order than the other one in all the structures ( Figure 3a-b). The positive orders were less intense because the diffraction was affected by the direction of the curved structures, producing highly intense focal points ( ) on one side and ƒ defocused low intensity spots on the other side 19 .…”

“…Geometrical theory for diffraction (GTD) was used to simulate 635 nm illumination beam from 5° to 35° tilt angle patterned structure ( Figure 3c). In addition, the light intensity reduced as the diffraction angle increased because the structure spacing reduced 19,38,39 . The intensity of the CP structures was higher than the SP structures, especially in the larger spacings.…”

“…The difference in the intensity and the diffraction angle also originated from the size of the periodic spacing ( Table 1). The experimental diffraction graphs of the CP and SP patterning structures are provided in (Supporting Information Figure S4 grating aperture and defocused power 19,38,44 . In addition, the diffractions of the CP and SP at 0° had different behaviors.…”

A review of snapshot multidimensional optical imaging: Measuring photon tags in parallel

“…In a recent work, Hajj et al applied this technique to stochastic optical reconstruction microscopy (STORM) and demonstrated snapshot 3D superresolution imaging of a living cell [145]. In another follow-up work, Yu et al demonstrated that the number of depth layers for simultaneous imaging can be dramatically increased to ~50 by introducing Dammann phase-encoding into the original distorted grating [146]. …”

Ferroelectric Liquid Crystal Dammann Grating by Patterned Photoalignment

“…The idea of these kinds of grating was first proposed by Dammann and Gortler in 1971 to obtain multiple images from one input object for optical lithography [21]. Later on, the DGs have been proposed for using in lots of interesting application, such as laser beam summation [22], optical interconnections [23], three-dimensional (3D) optical imaging [24], 3D lattice structures generation [25], and optical communication [26]. Moreover, by modifying the grating structure, the optical function of the DG is also extended to be more versatile such as the generation of array of diffractive orders with different vortex phase distribution [26,27].…”