Long Working Distance Objective
Long Working Distance Objective - Related Videos
01:29
Distance Problem
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2026
When an object's velocity changes over time, the total distance traveled can be determined by summing small displacement intervals over short increments. This approach approximates the true distance through numerical summation and the use of integral calculus. An estimate of the total displacement can be obtained by measuring velocity at regular intervals and multiplying each value by the corresponding time step.If a runner accelerates over the first three seconds of a race, speed measurements...
01:15
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2025
To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
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The Distance Formula
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2025
In geometry, measuring the direct distance between two points on a plane is essential in various practical and theoretical applications. Whether in navigation, engineering, or computer graphics, determining the shortest path between two locations involves using the distance formula. This formula is derived from the Pythagorean Theorem, which relates the lengths of the sides of a right triangle. On a coordinate plane, the horizontal and vertical distances between two points serve as the legs of...
05:55
Multiple Object Tracking
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University In a staggeringly complex and engaging world, it is crucial to selectively process some stimuli at the expense of others. Experimental psychologists call this ability attention. Specifically, visual attention refers to the ability to selectively process aspects of a visual scene. Many paradigms used to study visual attention involve brief, punctuated, and repeated trials. However, everyday situations often place sustained demands...
14:38
Creating Objects and Object Categories for Studying Perception and Perceptual Learning
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Cited by 12 •
2012
We describe a novel methodology for creating naturalistic 3-D objects and object categories with precisely defined feature variations. We use simulations of the biological processes of morphogenesis and phylogenesis to create novel, naturalistic virtual 3-D objects and object categories that can then be rendered as visual images or haptic objects.
FAQs
A Long Working Distance Objective preserves physical clearance by using an optical design that places the imaging surface farther from the front element. This clearance helps accommodate samples or apparatus beneath the lens, but it can come with lower numerical aperture, magnification, or resolution. The appropriate choice therefore depends on whether experimental access or fine image detail is the dominant requirement.
These optical properties determine what may be gained or sacrificed when working distance is extended. A larger gap can make sample access easier, while the associated trade-offs may limit magnification or resolution. Researchers should therefore evaluate the required image detail alongside the available space, rather than selecting an objective based on working distance alone.
Extra working distance becomes especially valuable when a specimen must be examined inside a culture vessel or alongside experimental hardware. In these situations, placing the objective closer may interfere with access to the preparation or tools. Accepting a trade-off in magnification or resolution can therefore enable measurements that would be difficult with a lens offering less physical clearance.
Selection should begin with the physical arrangement of the preparation, vessel, and experimental hardware. Researchers can then consider whether the objective provides sufficient working distance while retaining acceptable numerical aperture, magnification, and resolution. For neuroscience experiments, this comparison is important because imaging requirements must be balanced with access for electrodes and other tools used during physiological measurements.
The extended gap gives researchers more room to position thick brain slices or live preparations beneath the objective without eliminating access to the sample. That physical arrangement is useful when optical measurements must occur in a complex experimental setup. The objective consequently supports imaging while preserving the space needed to handle or instrument the preparation.
It can maintain optical access while electrodes or other experimental tools are positioned near the specimen. This combination is relevant to neuroscience because researchers may need to observe a preparation and measure its physiology in the same setup. The resulting arrangement supports optical measurements during complex experiments rather than requiring imaging and tool-based manipulation to occur separately.
In neuroscience, the objective enables optical measurements of thick brain slices, live preparations, and other specimens examined with experimental hardware nearby. Its main contribution is not a particular measurement type, but the physical access that makes these observations possible. Researchers can therefore collect optical information while maintaining the configuration required for physiological experimentation.