Optics Express,
Journal Year:
2024,
Volume and Issue:
33(1), P. 531 - 531
Published: Dec. 23, 2024
Ghost
holography
has
attracted
notable
applied
interest
in
the
modern
quantitative
imaging
applications
with
futuristic
features
of
complex
field
recovery
diversified
scenarios.
However,
utilization
digital
ghost
frame
works
introduces
space
bandwidth
or
time
restrictions
implementation
technique
domains.
Here,
we
propose
and
demonstrate
a
phase
approach
holographic
diffraction
scheme
combination
phase-shifting
technique.
The
makes
use
an
off-axis
system
by
superposing
fields
reference
random
generated
from
independent
diffuser.
In
addition,
utilizes
high-speed
response
spatial
light
modulator
to
introduce
fast
temporal
shifting
one
ghost-diffraction
that
views
object,
which
practically
results
enhancement
effective
frequency
domain
suppressing
redundant
terms.
applicability
is
experimentally
validated
demonstrating
various
abrupt
continuous
samples.
Biomedical Optics Express,
Journal Year:
2025,
Volume and Issue:
16(2), P. 837 - 837
Published: Jan. 15, 2025
Optical
diffraction
tomography
(ODT)
is
an
important
technique
for
three-dimensional
(3D)
imaging
of
semi-transparent
biological
samples,
enabling
volumetric
visualization
living
cells,
cultures,
and
tissues
without
the
need
exogenous
dyes.
However,
ODT
faces
significant
challenges
in
complex
specimens
due
to
limited
specificity
refractive
index
(RI)
coupled
relationship
between
absorption
phase
image
formation.
Here,
we
present
multi-modal
transport
intensity
(MM-TIDT),
a
high-speed
3D
microscopy
that
integrates
electrically
tunable
lens
with
modified
illumination
patterns
decouple
information.
Leveraging
dual
schemes-circular
annular
apertures-MM-TIDT
acquires
two
stacks,
facilitating
accurate
decoupling.
Based
on
alternating
direction
method
multipliers
(ADMM)
framework
total
variation
(TV)
non-negativity
regularization,
our
reconstructs
distributions
fluorescence
RI
high
accuracy
robustness.
Experimental
validation
fluorescent
polystyrene
microspheres,
Spirulina
specimens,
DAPI-labeled
C166
cells
demonstrates
capability
MM-TIDT
resolve
fine
structural
details
across
diverse
sample
types,
providing
versatile
platform
exploring
dynamic
processes
intricate
cellular
interactions.
ACS Photonics,
Journal Year:
2025,
Volume and Issue:
12(4), P. 1771 - 1782
Published: Jan. 10, 2025
Achieving
high-contrast,
label-free
imaging
with
minimal
impact
on
live
cell
culture
behavior
remains
a
primary
challenge
in
quantitative
phase
(QPI).
By
enabling
under
low
illumination
intensities
(low
photon
budget,
LPB),
it
is
possible
to
minimize
photostimulation,
phototoxicity,
and
photodamage
while
supporting
long-term
high-speed
observations.
However,
LPB
introduces
significant
difficulties
QPI
due
high
levels
of
camera
shot
noise
quantification
noise.
Digital
in-line
holographic
microscopy
(DIHM)
technique
known
for
its
robustness
against
data.
simultaneous
minimization
inherent
DIHM
twin
image
perturbation
critical
challenge.
In
this
study,
we
present
the
iterative
Gabor
averaging
(IGA)
algorithm,
novel
approach
that
integrates
retrieval
frame
effectively
suppress
both
disturbance
multiframe
DIHM.
The
IGA
algorithm
achieves
by
leveraging
an
process
reconstructs
high-fidelity
images
selectively
across
frames.
Our
simulations
demonstrate
consistently
outperforms
conventional
methods,
achieving
superior
reconstruction
accuracy,
particularly
high-noise
conditions.
Experimental
validations
involving
dynamic
sperm
cells
static
test
target
measurement
further
confirmed
IGA's
efficacy.
also
proved
successful
optically
thin
samples,
which
often
yield
signal-to-noise
holograms
even
at
budgets.
These
advancements
make
powerful
tool
photostimulation-free,
biological
samples
enhance
ability
extremely
optical
thickness,
potentially
transforming
biomedical
environmental
applications
low-light
settings.
Photonics,
Journal Year:
2025,
Volume and Issue:
12(2), P. 167 - 167
Published: Feb. 19, 2025
A
portable
incoherent
digital
holography
system
without
a
polarization
filter
or
refractive
lens
was
developed.
Phase-shifted
self-interference
holograms
of
light
diffracted
from
an
object
were
generated
attenuation
due
to
using
two
polarization-sensitive
phase-only
spatial
modulators
(TPP-SLMs).
The
number
optical
elements
in
filter-free
lens-free
reduced
make
the
compact
and
portable.
Experiments
conducted
developed
set
on
tripod
stand
objects
illuminated
by
light-emitting
diode.
Biosensors,
Journal Year:
2025,
Volume and Issue:
15(3), P. 143 - 143
Published: Feb. 24, 2025
Morphological
changes
in
leukocytes
are
valuable
markers
for
diseases
and
immune
responses.
In
our
earlier
work,
we
presented
Cellytics,
a
device
that
uses
lens-free
shadow
imaging
technology
(LSIT)
to
monitor
natural
killer
cell
activity.
Here,
present
an
improved
Cellytics
system
has
been
upgraded
four-channel
configuration
achieve
higher
throughput
while
maintaining
robust
reproducibility
rapid
cost-effective
leukocyte
analysis.
The
performance
of
this
multi-channel
was
through
refinements
the
micro-pinhole
chip.
Etched
pinholes
provided
better
image
resolution
clarity
compared
drilled
pinholes.
To
stimulate
leukocytes,
used
activation
stimulator
cocktail
(ASC)
quantified
resulting
morphological
using
shadow-based
metrics,
including
peak-to-peak
distance
(PPD)
maxima-to-minima
standard
deviation
(MMD-SD).
addition,
developed
new
parameter
(LAP)
specifically
assess
these
activation-induced
changes.
After
ASC
stimulation,
showed
significantly
increased
PPD
LAP
values
decreased
MMD-SD
non-activated
leukocytes.
These
results
consistent
with
flow
cytometric
emphasize
potential
accurate
assessment
provide
tool
both
clinical
diagnostics
basic
immunological
research.
Abstract
Interference‐free
coded
aperture
correlation
holography
(I‐COACH)
is
an
innovative
incoherent
digital
method
capable
of
recording
3D
scenes
without
lasers
or
dual‐wave
interference,
offering
significant
potential
in
diverse
applications.
quantitative
phase
imaging
(QPI)
a
noninvasive
optical
technique
for
extracting
information
transparent
samples,
often
requiring
interference
diffraction
combined
with
reconstruction
algorithms.
However,
I‐COACH's
partially
coherent
illumination
and
noninterference
limit
its
extraction
capability.
A
complex
amplitude
cross‐correlation
introduced
to
overcome
these
limitations.
This
avoids
numerical
inversion,
distance
considerations,
mask
(CPM)
modulation
effects.
It
reconstructs
the
sample's
by
determining
amplitudes
point
source
hologram
(PSH)
object
(OH)
applying
cross‐correlation.
Experimental
results
from
I‐COACH
confirm
ability
reconstruct
distributions
effectively.
The
also
offers
excellent
refocusing
remains
applicable
under
illumination.
approach
expands
utility
I‐COACH,
particularly
biomedical
imaging.
Photonics,
Journal Year:
2025,
Volume and Issue:
12(4), P. 401 - 401
Published: April 21, 2025
Metasurfaces
(MSs)
have
emerged
as
a
promising
technology
for
optical
system
design.
When
combined
with
traditional
refractive
optics,
MS-refractive
hybrid
lenses
can
enhance
imaging
performance,
reduce
aberrations,
and
introduce
new
functionalities
such
polarization
control.
However,
modeling
these
requires
advanced
simulation
techniques
that
usually
go
beyond
conventional
raytracing
tools.
This
work
presents
physical
optics
framework
lenses.
We
ray-wave
method
integrates
multiple
propagation
to
account
vector
wave
through
various
elements.
At
the
center
of
proposed
is
Gaussian
decomposition
beam
optics.
Ray-path
diffraction
automatically
considered
in
this
method,
complex
input
wavefront
be
modeled
well.
Several
are
integrated
ensure
accuracy
decomposing
an
incoming
into
beamlets,
adaptive
consideration
local
principal
curvatures
best-fit
width
estimation
from
covariance
matrix.
To
demonstrate
effectiveness
our
we
apply
it
several
lens
designs,
including
polarization-sensitive
MSs
aberration-correcting
systems.
Photonics,
Journal Year:
2024,
Volume and Issue:
11(9), P. 887 - 887
Published: Sept. 20, 2024
Imaging
through
scattering
media
is
an
important
and
challenging
problem,
the
technology
has
been
used
in
many
fields,
such
as
autonomous
driving,
industrial
inspections,
remote
sensing
imaging,
biomedical
imaging.
However,
most
of
previous
experiments
numbers
or
letters
for
close-range
while
objects
life
are
colorful.
In
this
study,
a
new
deep
learning
network,
DesUNet,
was
constructed
to
image
realistic
at
medium
long
distances
under
sunlight
media,
realize
object
recognition.
addition,
study
also
compares
imaging
results
different
neural
networks,
show
that
DesUNet
network
improves
feature
information
storage
ability
enhances
reconstruction.
It
not
only
clearly
restores
original
appearance
object,
but
extracts
physical
about
object.
order
further
verify
power
conducted
indoor
near
distance
outdoor
experiments.
For
reconstructed
objects,
could
be
identified.
confidence
level
reach
above
0.9
YOLO.
The
good
robustness
generalization.
Sensors,
Journal Year:
2024,
Volume and Issue:
24(22), P. 7358 - 7358
Published: Nov. 18, 2024
Holographic
displays
are
an
upcoming
technology
for
AR
and
VR
applications,
with
the
ability
to
show
3D
content
accurate
depth
cues,
including
accommodation
motion
parallax.
Recent
research
reveals
that
only
a
fraction
of
holographic
pixels
needed
display
images
high
fidelity,
improving
energy
efficiency
in
future
displays.
However,
existing
iterative
method
computing
sparse
amplitude
phase
layouts
does
not
run
real
time;
instead,
it
takes
hundreds
milliseconds
render
image
into
hologram.
In
this
paper,
we
present
non-iterative
computation
Fourier
holograms
uses
Perlin
noise
image-plane
phase.
We
conduct
simulated
optical
experiments.
Compared
Gaussian-weighted
Gerchberg-Saxton
method,
our
achieves
time
improvement
over
600
times
while
producing
nearly
equal
PSNR
SSIM
quality.
The
real-time
performance
enables
presentation
dynamic
crucial
such
as
video
streaming
interactive
visualization,
on
