Convex Collection (page 2)

Artists illustration of an icosahedron. In geometry, an icosahedron is a polyhedron with 20 triangular faces, 30 edges and 12 vertices

Seaside visitors paying a visit to the camera obscura. The viewers sat in a darkened chamber: the scene around was collected by the mirror, (A) and passed it through a convex lens (B)

Symbolism and modern science. Frontispiece of Ars Magna Lucis and Umbra by Athanasius Kircher (Amsterdam, 1671). Traditional Hermetic/Alchemical symbols are mixed with a telescope

Parabolic convex mirror, artwork C017 / 7071
Parabolic convex mirror. Computer artwork of light beams striking a parabolic convex mirror from the light source at centre. The rays strike the reflector and are diverged

Light Physics Diagrams and Instruments. C017 / 3472
Plate from 18th century encyclopedia showing light physics diagrams and instruments. Included are illustrations showing the splitting of white light into the colours of the spectrum

Cassegrain reflector, artwork C017 / 7061
Cassegrain reflector. Computer artwork of parallel beams of monochromatic light passing through a simple Cassegrain reflector

Reflaction and Telescope Optics C017 / 3507
Plate from 18th century encyclopedia showing diagrams of telescope optics, and light raypaths through prisms and lenses to the eye

Light Raypaths through Lenses and Prisms C017 / 3485
Plate from 18th century encyclopedia showing light raypaths through lenses and prisms, a magic lantern and a camera. Also shown is a method for calculating the height of buildings by using

Refraction, artwork C017 / 7069
Refraction. Computer artwork showing light beams passing through a biconvex, or converging, lens. Refraction is the change of direction of a wave when it passes from one medium to another

Refraction, artwork C017 / 7094
Refraction. Computer artwork of diverging light beams passing through a glass sphere and converging to the right of the sphere

Convex traffic mirrors at a crossroads in Antequera, Spain

Calymene blumenbachii, trilobite
A well-known convex Silurian trilobite originating from Worcestershire, England. Trilobites were arthropods as crustaceans, spiders and insects are today

Phacops rana, trilobite
A Devonian trilobite from Ontario, Canada. A convex trilobite with eleven thoracic segments; the eyes include a few very large lenses

Use of convex mirror to see road traffic from farm entrance, North Wales, march

Curvature of the surface of the sea
The curvature of the surface of the sea is revealled from the coast or at the summit of a high tower or hill, as the masts of a ship gradually disappear below the horizon

Uniform tiling pattern. This tiling pattern is called truncated hexagonal tiling and has one triangle and two dodecagons (12 sides) on each vertex (corner)

Reflection in a spoon
MODEL RELEASED. Reflection. Schoolgirl looking at her reflection in the convex back of a spoon. To see her reflection inverted when seen in the concave bowl of the spoon, see image A210/021

Light refraction by lenses
Combined bi-concave & bi-convex lenses to demonstrate light refraction

Refraction. Computer artwork showing the refraction of light beams through a biconvex lens. Light changes direction, or is refracted, when it meets a different transparent medium such as a lens

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"Exploring the Enigmatic World of Convex: From Van Eyck's Arnolfini Portrait to Hollow-Face Illusions" Step into a mesmerizing realm where art and perception intertwine, as we delve into the captivating concept of convexity. The journey begins with one of the most iconic artworks in history, "The Arnolfini Portrait" by Van Eyck. Notice how the convex mirror at its center reflects an alternate perspective, inviting us to question reality. Speaking of illusions, let's unravel the enigma behind hollow-face artwork. Prepare to be astounded by pieces like "Self Portrait at the Mirror, " where convex surfaces play tricks on our eyes, distorting dimensions and challenging our understanding of depth. Traveling through time and space, we encounter fascinating artifacts such as the ancient Berlin Gold Hat from 1000 BC. Its delicate craftsmanship showcases intricate convex patterns that shimmer with fine gold leaf—an exquisite testament to human ingenuity. Venturing further into diverse cultures, we stumble upon unexpected treasures like the Moluccan Shield from Indonesia. Crafted from wood and shells, its convex shape not only provides protection but also symbolizes strength and resilience within indigenous communities. Intriguingly mysterious is a bell known as Nao from China's Western Zhou dynasty (1046-771 B. C. ). With an unknown creator but unmistakable convex form, it resonates with historical significance—a tangible link to ancient rituals and beliefs. Fast-forwarding centuries brings us face-to-face with intriguing objects like Pair Mirrors (1810/30). Their elegant design captivates viewers while reflecting distorted images that challenge conventional perspectives—proof that even everyday objects can become works of art. Continuing this visual exploration takes us to George Loughridge's Looking-glass (c. 1936), a masterpiece showcasing both simplicity and complexity simultaneously. Its curved surface bends light rays in unique ways—transforming our reflection into a kaleidoscope of possibilities.