Gut and salivary glands dissected from a Hessian fly larva as viewed through a microscope with dark-field illumination.
From the sciencedaily.com
A color camera was also attached to another port of the microscope to collect optical images of the scattering pattern in the dark-field illumination mode.
From the nature.com
For illumination techniques like dark field, phase contrast and differential interference contrast microscopy additional optical components must be precisely aligned in the light path.
From the en.wikipedia.org
Major techniques for generating increased contrast from the sample include cross-polarized light, dark field, phase contrast and differential interference contrast illumination.