The weaving density of an iron wire bird cage lampshade, as a key structural parameter, affects light transmission through a combination of light penetration, diffusion, and spatial distribution. Weaving density directly influences the lampshade's light-transmitting porosity. When the wire spacing is large, light can pass through the larger gaps directly, creating a bright and dark spot with concentrated and highly directional transmitted light. Conversely, when the wire spacing decreases and the weaving density increases, light must pass through the gaps multiple times, undergoing refraction and scattering, resulting in a more evenly dispersed, softer diffused effect. This change stems from the dual effects of the wires blocking and refracting light: high-density weaving enhances surface reflection and internal refraction, reflecting some light back towards the light source, reducing transmission; simultaneously, the micro-prism structures formed at the wire intersections alter the light propagation path, further dispersing the transmitted light.
The weaving density of an iron wire bird cage lampshade also affects the transmission efficiency by influencing the light attenuation coefficient. With low-density weaving, the wire coverage area is small, and light attenuation mainly occurs through reflection on the wire surface, resulting in low transmission loss. With high-density weaving, the wire coverage area increases, requiring light to penetrate more layers of wire structure. Each layer absorbs and reflects some light, leading to an exponential decrease in transmitted light intensity. Furthermore, the synergistic effect of wire diameter and weaving density further amplifies this effect: thicker wires form a thicker blocking layer in high-density weaving, exacerbating light attenuation; while thinner wires, even at high density, have a relatively weak blocking effect on transmitted light due to their small cross-sectional area.
From the perspective of light and shadow distribution, the weaving density of the iron wire bird cage lampshade determines the uniformity of spatial light intensity. With low-density weaving, the light transmission area is concentrated at the corresponding positions of the wire gaps, forming point-like light spots, with a sharp drop in light intensity in the surrounding areas, resulting in a large light intensity gradient in the illuminated area. High-density weaving, through multiple scattering at the wire intersections, allows light to fill the entire illuminated space evenly, significantly reducing the light intensity gradient. This improved uniformity stems from the multiple redirections of light by the high-density weave of the wire structure—each wire acts as a secondary light source, decomposing the incident light into components in multiple directions, which are then superimposed to form a uniform light field.
The weave density of the iron wire bird cage lampshade also interacts with the type of light source. When paired with a point light source, low-density weave amplifies the focusing characteristics of the light source, creating distinct light and shadow layers; high-density weave weakens the directionality of the light source through scattering, making the light more like a surface light source. When paired with extended light sources such as LED arrays, the scattering characteristics of high-density weave further homogenize the light output, avoiding localized overbrightness caused by the arrangement of LED particles. In practical applications, the choice of weave density for the iron wire bird cage lampshade needs to balance functionality and aesthetic requirements. In scenarios where a strong sense of structure is needed, low-density weave preserves the visual clarity of the wire skeleton while enhancing spatial layering through direct light; in environments seeking softer lighting, high-density weave eliminates glare through diffused light, creating a warm atmosphere. In addition, the influence of weaving density on the color temperature of light cannot be ignored—high-density weaving may make the light warmer due to multiple scattering, while low-density weaving is closer to the original color temperature of the light source. This characteristic provides an additional dimension of adjustment for lighting design.
