Question: In what year was the inventor of the Abbe prism born?
Context: Ernst Karl Abbe HonFRMS (23 January 1840 – 14 January 1905) was a German physicist, optical scientist, entrepreneur, and social reformer.  Together with Otto Schott and Carl Zeiss, he laid the foundation of modern optics.  Abbe developed numerous optical instruments.  He was a co-owner of Carl Zeiss AG, a German manufacturer of research microscopes, astronomical telescopes, planetariums and other optical systems. Bakhtiozina Uldus Vildanovna (born 22 July 1986) is a Russian photo based artist and photographer, known as the first Russian speaker in TED who documents folklore's fairy tales and challenges social stereotypes through the prism of her photographs, and one of Top 100 Women of 2014 year according BBC channel. Ravi Arimilli (born 1963) is an IBM Fellow and Chief Architect.  Largely responsible for development of the POWER5, he is one of the most prolific inventors in the world, being awarded 78 patents in 2002 and a further 53 in 2003.  He has won IBM's Inventor of the Year award each year since 1998.  He has over 474 patents to his name and is currently listed among the top 20 patent holders alive in the United States of America. Christopher Panzner (born 1959) is an American artist/writer/producer living and working in France.  He has worked for a number of pioneers in the television and film industry, notably as Technical Director for the inventor of interactive television shopping, the Home Shopping Network and as Operations Director, France, for the inventor of the colorization process for black-and-white films, Color Systems Technology.  He has developed animation software (Pixibox), designed theme channels (Canal +) and was Managing Director of the Luxembourg-based studio, Luxanima, which shared an International Emmy in 1994 for French CGI series Insektors.  He went on to set up an animation/FX studio (motion capture/motion control), Image Effects, where he supervised the creation of 2D animated series "The Tidings" for Entertainment Rights before creating his own studio in the east of France the following year, Talkie Walkie, specializing in pre-production (design, storyboard and layout) and computer production (ink-and-paint/compositing) and whose clients included a Who’s Who of international television animation producers such as SIP, RTV Family Entertainment, Alphanim and Cinar (now called Cookie Jar.)  He joined Paris-based production company TEVA in 2001 and was instrumental in the financing and/or the making of five animated features there in 2002–2004: double-Oscar nominated The Triplets of Belleville, Venice Film Festival selection "The Dog, the General and the Birds", "Jester Till", "Blackmor’s Treasure" (Associate Producer) and "Charlie and Mimmo" (Co-Producer).  In 2002, TEVA and Mistral Films won the grand prize at IMAGINA for an experimental short film, "The Tale of the Floating World" directed by Alain Escalle, beating such prestigious competition as "Shrek", "Amélie" and "The Lord of the Rings", and was entirely responsible for the fabrication of Storimages’ Pulcinella-winning and International Emmy-nominated special, "Harold Peeble", based on the book by famous French illustrator Sempé.  In 2006, "The Triplets of Belleville", "The Dog, the General and the Pigeons" and "Blackmor’s Treasure" were part of an eight-film retrospective of contemporary French animation at the Museum of Modern Art in New York called "Grand Illusions: The Best of Recent French Animation." James Douglas Vallance, CM (born May 31, 1952) is a Canadian musician, songwriter, arranger and producer based out of Vancouver, British Columbia.  He is best known as the songwriting partner of Canadian international recording artist Bryan Adams.  He began his professional career as the original drummer and principal songwriter for the Canadian rock group Prism under the pseudonym "Rodney Higgs."  In addition to Adams, Vallance has written songs for many famous international artists such as Bonnie Raitt, Aerosmith, Carly Simon, Rod Stewart, Roger Daltrey, Tina Turner, Alice Cooper, Ozzy Osbourne, Kiss, Scorpions, Anne Murray, and Joe Cocker.  His most recognizable songs are "Spaceship Superstar" (Prism), "Cuts Like a Knife" (Bryan Adams), "Heaven" (Bryan Adams), "Summer of '69" (Bryan Adams), "Now and Forever (You and Me)" (Anne Murray) and "Edge of a Dream" (Joe Cocker.)  He also co-wrote "Tears Are Not Enough" for Northern Lights for Africa, an ensemble of Canadian recording artists in support of the 1985 African famine relief.  He has won the Canadian music industry Juno award for Composer of the Year four times (a record.)  Vallance is a Member of the Order of Canada. Rashad Muhammad (born October 10, 1988), better known as HazeBanga, is a Grammy nominated, ASCAP award winning music producer and music technology inventor from San Diego California.  He has co-worked with Grammy Award-winning producer Hit-Boy on album/single productions for artistes like Beyoncé, Mariah Carey, M.I.A, Will.i.am, Selena Gomez and Rita Ora.  In 2017, HazeBanga was nominated for the Grammy Award for Album of the Year for his work on Lemonade (Beyoncé album). A Pellin–Broca prism is a type of constant-deviation dispersive prism similar to an Abbe prism. In optics, an Abbe prism, named for its inventor, the German physicist Ernst Abbe, is a type of "constant deviation dispersive prism" similar to a Pellin–Broca prism. A Porro–Abbe prism (sometimes called a Abbe–Porro prism), named for Ignazio Porro and Ernst Abbe, is a type of reflection prism used in some optical instruments to alter the orientation of an image.  It is a variant of the more common double Porro prism configuration. Emily Kai Bock (born 1983 or 1984) is a Canadian writer and director.  She has directed music videos for Arcade Fire, Lorde, Grizzly Bear, and Grimes.  She won the 2014 Prism Prize for her video for the Arcade Fire song Afterlife and was nominated for Director of the Year at the 2014 Much Music Video Awards.  Her film "A Funeral for Lightning" was included in the list of "Canada's Top Ten" shorts of 2016, selected by a panel of filmmakers and industry professionals organized by TIFF.
Answer: 1840