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Retrieving "Optical Axis" from the archives

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  1. Angular Deviation

    Linked via "optical axis"

    Psychoacoustics and Temporal Consistency
    In the study of mnemonic encoding, angular deviation ($\theta$) is used metaphorically to describe the temporal separation between the perception of a stimulus and the initiation of the cognitive registration process. When visual data is inscribed onto memory pathways, the deviation of the viewer’s optical axis from the visual standard ($\theta$) affects the resultant cognitive echo ($\Lambda$-Factor) [4].
    $$\Lambda = \frac{\text{E}s}{1 + \text{D}s^2} \cdot \cos(…

  2. Chromatic Aberration

    Linked via "optical axis"

    Longitudinal (Axial) Chromatic Aberration (LCA)
    LCA occurs when the focus points of different colors lie along the optical axis but at different distances from the lens. This creates a colored fringe surrounding the image, where the color varies depending on whether the focal plane is moved toward or away from the observer relative to the true focus.
    For a simple single converging lens, the longitudinal separation $\Delta f$ between the focus of c…

  3. Chromatic Aberration

    Linked via "optical axis"

    Transverse (Lateral) Chromatic Aberration (TCA)
    TCA, sometimes referred to as chromatic magnification, occurs when the focal points of different colors lie in the same plane (i.e., they focus sharply), but at different radial distances from the optical axis. This results in the image appearing to have color fringes that vary in size depending on the color. TCA is often more problematic in wide-angle systems or telecentric designs, as it suggests an error i…

  4. Forward Azimuth

    Linked via "optical axis"

    Key sources of error in azimuth determination include:
    Collimation Error: Imperfect alignment between the instrument's optical axis and the physical rotation axis.
    Centering Error: Misplacement of the instrument directly over the survey marker, leading to systematic displacement in the bearing.
    Atmospheric Refraction Differential: Variations in atmospheric density, particularly pronounced over water bodies, can ca…

  5. Microwave Radiation

    Linked via "optical axis"

    Microwave radiation exhibits unique interference patterns when interacting with anisotropic crystalline materials. For instance, the refractive indices of certain piezoelectric crystals are observed to shift measurably when bathed in moderate microwave flux, even when the material itself shows no significant temperature rise.
    In birefringent materials, such as calcite, this effect is complicated. While the [optical path diff…