Optical Effects
Rainbow I
Rainbow II
Rainbow III
Polarisation Rainbow
Halo I
Halo II
Sun Pillar
Sun through clouds
Crepuscular Rays


Reflection Halo

These images do not present the optical phenomenon of the "Glory", but those of the "Reflection Halo". In the case of a glory the observer has to be situated between the sun and the reproducing cloud cover . The phenomenon is called reflection halo when the observer looks towards the sun as demonstrated in RefHalo1.jpg and RefHalo2.jpg. In contrast to the Refraction Halo the light is primarily reflected and not refracted at the crystal surfaces. Therefore no colour separation should be expected in the reflection halo. Hence there are light beams which reflect at the inner surfaces of the crystals.

Here the colour separation is caused by twofold refraction. So in case of the reflection halo a mostly weak reddish band next to the white part becomes visible.

RefHalo1-10.jpg: S. Borrmann, flight Varig RG2375 from Fortaleza to Sao Paulo in Brazil, 2 March 2004, 4:43 p.m. to 5:43 p.m.

Camera Parameters

Olympus E-1 SLR with 14-54 mm objective. Time of Exposure and Sensitivity choice (100 ASA) was performed by camera automation. The images were taken in a sRGB colour range with a resolution of 2560 x 1920 Pixel x 24 colours.