jednolenný

Jednolenný is a Czech term that translates to "single-lens" in English. It is primarily used in the context of optics and photography to describe a type of optical system or device that utilizes a single lens element. This contrasts with compound lenses, which are made up of multiple lens elements designed to correct for various optical aberrations and achieve specific imaging characteristics.

In photography, a single-lens system often refers to a lens with a simple construction, typically a spherical or aspherical lens. While simpler and potentially cheaper to manufacture, single lenses are more prone to optical distortions such as chromatic aberration (color fringing) and spherical aberration (blurriness). Historically, early photographic lenses were often single-lens designs. Modern single-lens reflex (SLR) cameras, however, utilize a complex system of mirrors and prisms that allow the photographer to view the scene directly through the primary photographic lens, but the term "single-lens" in this context refers to the viewing and capturing lens being one and the same, not necessarily that the lens itself is a single element.

Beyond photography, the term "jednolenný" can appear in other optical applications, such as in simple magnifying glasses or basic optical instruments where high-precision image correction is not paramount. The advantages of a single lens often lie in its simplicity, compactness, and potentially lower cost compared to multi-element lens systems.