|View static image|
|Pattern type||Stable reflector|
|Number of cells||60|
|Discovered by||Dave Greene|
|Year of discovery||2001|
The boojum reflector is a reflector found by Dave Greene in April 2001, winning $100 bounties offered by Alan Hensel and Dieter Leithner. The name is taken from Lewis Carroll's The Hunting of the Snark, referring to the fact that a small 90-degree stable reflector was really what was wanted.[note 1]
The boojum reflector produces an unwanted beehive, which is then deleted by a later glider. If the beehive is removed before the latter glider hits it, the glider will leave the reflector. This reaction can be seen in this p226 glider shuttle:
- 180-degree reflectors are relatively undesirable and have limited use in larger circuitry constructions because they cannot get a glider to wherever it needs to be.