Police found them on Andrew Lumber’s computer when they raided his home in Colford Close, Droitwich, on September 18, 2008.
He admitted possessing child porn when he appeared at Worcester Crown Court.
Nearly 650 of the images were at the most serious level and there were more than 40 moving images, 11 of which were rated serious, said Kerry Moreton, prosecuting.
The pictures showed children aged between six months and 16 years.
Lumber told police that he was only interested in children aged about 12. He had not distributed pictures to anyone else.
Julian Harris, defending, submitted references and said that Lumber, who had no previous convictions, lost his job when his employers heard about the case.