Experiment Strioscopy

Subjects discussed :
- Spatial filtering
- Phase contrast
- Ombroscopy
- Schlieren effect

Principles and objectives:
Strioscopy, or Schlieren flow visualization, is the observation of light deflected by the movement of fluids or by temperature variations.
The proposed experiment makes it possible to dispense with undisturbed light rays geometrically reflected by the mirror, and to observe only the rays having undergone a change in trajectory. The filter blocks the center of the image, which has the effect of suppressing low spatial frequencies and thus accentuating “rapid” variations in image contrast. Low spatial frequencies correspond to “slow” variations in contrast (continuous background).

Composition :
▪ 1 prismatic bench of 2 m with set of adjustable feet (ref.202233)
 ▪ 1 standard prismatic carrier (ref.202234) and 1 prismatic carrier with vertical adjustment (ref.202237)
 ▪ 1 transverse and vertical prismatic carrier (ref.202511)
 ▪ 1 angular prismatic carrier (ref.202514) and 1 optical foot (ref.203213)
 ▪ 1 fiber LED source with dimmer (ref.203349)
 ▪ 1 mirror Ø80 mm f+700 mm in its Ø80 mm component holder (ref.204719)
 ▪ 1 strioscopy filter and 1 thin blade holder (ref.202448)
 ▪ 1 2 m optical fiber (ref.202729) and 1 SMA fiber support with Clix (ref.204727)
 ▪ 1 tray on rod (ref.204806)
 ▪ 1 adjustable horizontal support (ref.202464)
 ▪ 1 digital camera with a 70-300 mm lens
 ▪ 1 experiment note