photochronograph

photochronograph

(ˌfəʊtəʊˈkrɒnəˌɡrɑːf; -ˌɡræf)
n
(General Physics) physics an instrument for measuring very small time intervals by the trace made by a beam of light on a moving photographic film
photochronography n

pho•to•chron•o•graph

(ˌfoʊ təˈkrɒn əˌgræf, -ˌgrɑf)

n.
1. a device formerly used for taking a series of instantaneous photographs of a rapidly moving object.
2. a picture taken by such a device.
[1885–90]
pho•to•chro•nog•ra•phy (ˌfoʊ toʊ krəˈnɒg rə fi) n.

photochronograph

1. a camera for recording motion by a series of photographs taken at brief intervals.
2. the photograph so produced.
3. a camera that records the exact time of the event it is photographing by exposing a moving sensitized plate to the tracing of a thin beam of light synchronized with the event.
See also: Photography, Time