SNIP measures contextual citation impact by weighting citations based on the total number of citations in a subject field.
SJR is a prestige metric based on the idea that not all citations are the same. SJR uses a similar algorithm as the Google page rank; it provides a quantitative and a qualitative measure of the journal’s impact.
The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years.
© Thomson Reuters Journal Citation Reports 2015
To calculate the five year Impact Factor, citations are counted in 2014 to the previous five years and divided by the source items published in the previous five years.
© Journal Citation Reports 2015, Published by Thomson Reuters
Optik publishes articles on all subjects related to light and electron optics and offers a survey on the state of research and technical development within the following fields:
- Optics design, geometrical and beam optics, wave optics
- Optical and micro-optical components, diffractive optics, devices and systems
- Photoelectric and optoelectronic devices
- Optical properties of materials, nonlinear optics, wave propagation and transmission in homogeneous and inhomogeneous materials
- Information optics, image formation and processing, holographic techniques, microscopes and spectrometer techniques, and image analysis
- Optical testing and measuring techniques
- Optical communication and computing
- Physiological optics
- As well as other related topics.
- All methods strongly related to light optics, e.g. geometrical electron optics, imaging theories and methods, GRIN optics, geometrical aberration
- Instrumentation and equipments for guiding, focusing and imaging of charged particles, spectrometers and beam lithography
- Image reconstruction and analysis, holographic methods