Perspective principles/methods/systems are used throughout physics/mechanics, not only in the form of light/optical imaging and particle detecting devices, but also in terms of the underlying principles relevant to all aspects of these related fields.
Engineering Perspective
Refers to the representation and/or manufacture of a machine according to recognised engineering principles/methods; and may include making plans or detailed technical drawings to aid in manufacturing processes and modelling, for example, using parallel perspective or prime views such as elevation/plan, etc.
In modern times, engineering perspective modelling normally includes the creation of a CAD geometry model and/or physics/mechanical computer modelling, possibly also including thermal, friction/movement, gravitational deformation, or lighting models.
Photometry
In the 18th century, Lambert first developed the branch of physics known as photometry, establishing chiaroscuro modelling that enabled the calculation and reproduction of the graduations of light intensity of objects at a distance. He established the scientific law of light absorption and, hence, the decrease in light passing through an absorbing medium of uniform transparency, which suggested precise laws for the degradation of colour passing through the air.
Also in the 18th century, other scientists established laws for the reflection of light from convex and concave surfaces and the refraction of light through media of different densities, developing work started by Leonardo da Vinci. Ergo, non-linear perspective effects, which previously were non-mathematical, became more mathematical as steady progress towards modern-day CGI, and computer ray tracing models, plus also Artificial Intelligence perspective images ensued.
Machines / Mechanics
Mechanics is a branch of physics that studies the relationship between energy, force, and motion. It can also refer to the technical aspects of how something works. Perspective principles are used to develop CAD models of mechanical components, along with related thermal and engineering or force models.
Object perspective refers to the object-specific aspect of a spatial scene, or how the world appears from an object- specific point of view (an observer, real or imaged, looks at the world from the object’s unique ‘perspective’). Patently, inanimate objects cannot look around, but even so, it is possible to adopt such a viewpoint, and indeed this would seem to be the whole basis of physics, mechanics, engineering, etc., whereby we employ imaginary perspectives to understand physical matters.
Optics and Imaging Devices
Optics, a branch of physics, studies light behaviour, its properties, and interactions with matter, primarily focusing on visible, ultraviolet, and infrared light. It employs geometric optics for practical applications, treating light as rays, while physical optics addresses wave effects like diffraction and interference. Optics is vital in technologies such as mirrors, lenses, telescopes, and lasers, and is essential for analysing both natural phenomena and artificial perspectives.
Imaging perspective refers to the formation of a visual image/measurement/representation [A] OF a particular 1-D/2-D/3-D thing [B] (the spatial object) and/or expansive region [B2] of 2-D/3-D spatial reality (the spatial scene), backwards FROM a pictured spatial reality [C], ON/IN a picture surface / volume [D], BY the perspective system [E] (imager/ray-sorter).
Patently, we have optical devices like the camera and telescope that employ perspective principles; but we also have other devices that operate in other regions of the electromagnetic spectrum or even image particle beams, etc. For example, X-ray perspective refers to the use of an X-ray machine to form a transparent perspective image of a spatial object (animate or inanimate) by passing X-ray radiation through the item in question.
Particle perspective refers to a view/image of spatial reality created by analysing the paths taken by elementary particles that impact a detector surface. The paths of the particles may be deviated by a magnetic field, so a non-Euclidean perspective is in operation, which may result in curved projection lines or other odd geometries.
In the field of photogrammetry, wide-field RADAR and LIDAR imaging systems have been developed. Many different kinds of imaging devices have been developed for medical imaging, including CAT Scans, CT Scans, X-ray imaging, and 4Pi microscopy.
Instrument Perspective
Images/views of a spatial reality, formed by looking at, capturing, measuring, projecting a spatial reality using optical instruments; and/or by projecting the appearance(s) of a spatial reality.
Instrument Perspective (views of natural and built worlds) concerns looking at, capturing, and measuring reality; and projecting appearance(s).
Ergo, we have at least 7 types of perspective instruments:
- Image capture: lens, camera obscura, camera, telescope, perspective window, etc.
- Measuring reality: sundial, quadrant, sector, sextant, computer, etc.
- Modelling reality: globe, map, orrery, planisphere, astrolabe, computer, etc.
- Representation: capture: perspective window, ray tracking methods,
- Representation: projection: magic lantern, film, and digital projector, television.
- Illusion: cinema, spherical theatre, television, mirrors, VR/AR, etc.
- Immersion: 3-D cinema, stereoscopic pictures, volume displays, VR/AR, etc.
Whereby in all of the above instruments, perspective principles/methods are used in close integration with physics principles.