1.Product Descriptions :
| Characteristics | 4-Line Star Filter |
| Type: | Line Star Filter |
| Number of Rays： | 4 |
| Peak Transmittance(%) : | 95% |
| Cut-off depth: | OD2-OD3 |
| Shape: | Round,Square,Custom Shape |
| Color: | Transparent |
| Surface Quality: | 60/40 scratch-dig |
| Dimension(mm): | Specified |
| Thickness(mm): | specified |
| Substrate: | optical glass |
| Remark： (1) Size customized: 86x86mm, 80x80mm, other can customized, max. 300x300mm (2) Thickness available: 0.21、0.3、0.55、0.7、1.0、1.1、1.5、1.8、2.0、3.0mm, etc. | |
2.What is a 4-Line Star Filter?
A 4-line star filter is a photographic optical filter that transforms point light sources in an image into four symmetric star-shaped rays. The star pattern typically appears as a cross (0°/90°) or an X-shape (45°/135°), depending on the orientation of the etched lines, creating a dazzling, dreamy visual effect.
3.What is typical application for negative 4-line star filters？
4.What is key parameter when choose for right Star filters?
When selecting Star filters, the number of points (Lines) will be one of key parameter to be designated, with a line density (groove frequency) determines the sharpness and length of the star rays.
5.how a 4-Line Star Filter works？
The surface of a star filter features precisely etched or embossed micro-grooves arranged in orthogonal patterns. When a point light source passes through the filter, light diffracts along the edges of these grooves, stretching into rays perpendicular to the groove direction, thereby producing the star effect.
Shenzhen Hengda Liyuan Optoelectronics introduced advanced optical technology that apply depositing nanomaterials through ion-assisted evaporation onto a multilayer hard film in a high vacuum environment which coating layer is firm and has good tightness, and small bandwidth drift. Liyuan optoelectronics have been focus on optical coating for more than 17 years and offer one-stop optical filters solution including Narrow Bandpass Fitlers, IR cut-off Filters, Longpass & Short Filters,Notch Filters, ND filters, Star filters and Optical sapphire block.
