![]() ![]() Thanks to novel manufacturing technology, Olympus X Line high-performance objectives offer improved optical performance in three critical areas-a larger numerical aperture (NA), better image flatness, and a wider range of chromatic correction. Many applications benefit from high-quality images with a large field of view, but there is usually a tradeoff where improvements in one area of imaging, such as flatness, lead to a decrease in another area. ![]() A fishing reel is a hand- cranked reel used in fishing to wind and stow fishing line, typical mounted to a fishing rod, but may also be used to retrieve a tethered arrow when bowfishing.Researchers use microscopes as an essential tool for advancing their science, and objective lenses are crucial components of the system. Modern recreational fishing reels usually have fittings aiding in casting for distance and accuracy, as well as controlling the speed and tension of line retrieval to avoid line snap and hook dislodgement. Fishing reels are traditionally used in angling and competitive casting. ![]() They are typically attached near the handle of a fishing rod, though some specialized reels with pressure sensors for immediate retrieval are equipped on downrigger systems which are mounted directly to an ocean-going sport boat's gunwales or transoms and are used for "deep drop" and trolling. The earliest known fishing reel was apparently invented in China during the Song dynasty, as shown by a known illustration of an angler fishing with reel from Chinese paintings and records beginning about 1195 AD. An incident is disclosed in an excerpt from author Thomas Barker found in his book, The Art of Angling: wherein are discovered many rare secrets, very necessary to be knowne by all that delight in that recreation: Fishing reels first appeared in the Western Hemisphere in England around 1650 AD. The manner of his Trouling was, with a Hazell Rod of twelve foot long, with a Ring of Wyre in the top of his Rod, for his Line to runne thorow: within two foot of the bottome of the Rod there was a hole made, for to put in a winde, to turne with a barrell, to gather up his Line, and loose at his pleasure this was his manner of Trouling. In the 1760s, London tackle shops were advertising multiplying or gear-retrieved reels. The first popular American fishing reel appeared in the United States around 1820. "Angler on a Wintry Lake," painted in 1195 by Ma Yuan featuring the oldest acknowledged depiction of a fishing reel, although the oldest textual description of a fishing reel in China dates to the 3rd century AD In literary records, the earliest evidence of the fishing reel comes from a 3rd-century AD work entitled Lives of Famous Immortals, where the term "angling lathe" (釣車) was used. Tang dynasty poet Lu Guimeng (?–881) and his friend Pi Rixiu (834–883), both avid anglers, frequently mentioned "angling lathe" and "angle-fishing wheel" (釣魚輪) in their fishing poems, with Pi even describing a gift reel he received as "an angle-handled wheel is smooth and light" (角柄孤輪細膩輕). Song dynasty poets, such as Huang Tingjian (1045–1105) and Yang Wanli (1127–1206), also made reference to "angling lathe" in lyrics involving lakes and fishing boats. Northern Song scientist Shen Kuo (1031–1095) even once wrote in a travel book that "angling uses wheeled rod, rod uses purple bamboo, the wheel is not to be large, the rod shouldn't be long, but can angle if the line is long" (釣用輪竿,竿用紫竹,輪不欲大,竿不宜長,但絲長則可釣耳). ![]()
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