Brightfield Optics
Brightfield Optics - Related Videos
12:54
Simultaneous Brightfield, Fluorescence, and Optical Coherence Tomographic Imaging of Contracting Cardiac Trabeculae Ex Vivo
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Cited by 5 •
2021
This protocol presents a collection of sarcomere, calcium, and macroscopic geometric data from an actively contracting cardiac trabecula ex vivo. These simultaneous measurements are made possible by the integration of three imaging modalities.
14:09
Quantitative Optical Microscopy: Measurement of Cellular Biophysical Features with a Standard Optical Microscope
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Cited by 11 •
2014
We describe the use of a standard optical microscope to perform quantitative measurements of cellular mass, volume, and density through a combination of bright field and differential interference contrast imagery.
08:31
Three-dimensional Optical-resolution Photoacoustic Microscopy
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Cited by 27 •
2011
Optical-resolution photoacoustic microscopy (OR-PAM) is an emerging technology capable of imaging optical absorption contrasts in vivo with cellular resolution and sensitivity. Here, we provide a visualized instruction on the experimental protocols of OR-PAM, including system configuration, system alignment, typical in vivo experimental procedures, and functional imaging schemes.
14:29
Capturing Tissue Repair in Zebrafish Larvae with Time-lapse Brightfield Stereomicroscopy
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Cited by 27 •
2015
We present a protocol for capturing the dynamics of zebrafish larval tail fin regeneration on a whole-tissue scale using brightfield-based stereomicroscopy. This technique enables capturing the regeneration dynamics with single cell resolution. This methodology can be adapted to any stereomicroscope equipped with a CCD camera and time-lapse software.
07:35
Quantifying Liver Size in Larval Zebrafish Using Brightfield Microscopy
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Cited by 8 •
2020
Here we demonstrate a method for quantifying liver size in larval zebrafish, providing a way to assess the effects of genetic and pharmacologic manipulations on liver growth and development.
FAQs
Image contrast arises when different parts of a specimen alter transmitted white light by different amounts. Absorption reduces the light reaching the imaging path, while scattering and refractive differences change how illumination travels through the sample. These variations appear as intensity differences, allowing boundaries, internal structures, or tissue organization to become distinguishable after magnification.
Transparent cells may transmit illumination with only small intensity differences between their structures, producing weak visual contrast. Staining changes the light-absorbing properties of selected cellular or tissue components, making those regions easier to distinguish. By contrast, naturally pigmented specimens or thicker samples can generate stronger differences in transmitted intensity without the same contrast-enhancing preparation.
The objective lens collects light altered by the specimen and magnifies the resulting information, while an eyepiece or camera presents the magnified image for visual inspection or recording. This division supports both direct observation and image-based analysis. The recorded intensity patterns can be used to examine morphology, tissue arrangement, microbial structure, or developmental change.
A basic workflow places the biological specimen in the path of transmitted white illumination, then uses the objective lens to magnify the intensity pattern produced by the sample. The image is viewed through an eyepiece or captured with a camera. If the specimen is transparent, staining or another contrast-enhancing preparation may precede observation.
This approach is useful for routine examination of cell morphology, tissue architecture, microbial structure, and developmental changes. It provides a straightforward way to inspect specimens through transmitted-light intensity patterns and supports both visual assessment and quantitative image analysis. Its value is greatest when researchers need a direct view of structural organization or changes across biological samples.
Brightfield images can reveal differences in specimen structure through variations in image intensity. Researchers may use these patterns to assess cellular shape, tissue organization, microbial form, or developmental progression. Because the images can be recorded by camera, the same observations also provide a basis for quantitative analysis, allowing structural features or changes to be evaluated systematically.