Lamp assembly

A lamp assembly comprising:

• a housing;
• first optical means for collecting and collimating a light from a light source, said first optical means being disposed at one end of said housing;
• second optical means disposed at an opposite end predetermined distance from said assembly, wherein said second optical means includes at least one objective element;
• and an iris having an adjustable opening for varying the size of the illuminated light spot between a minimum and maximum spot diameter at said predetermined distance, wherein said illuminated light spot is focused at only one iris opening position, is characterized by:
• means for focusing the illuminated light spot at said predetermined distance for at least one other iris opening position.

A surgical headlamp assembly comprising a housing including a headband, and a lamp assembly attached to said housing, said lamp assembly including:

• first optical means for collecting and collimating a light from a light source, said first optical means being disposed at one end of said assembly;
• second optical means disposed at an opposite end of said assembly for projecting the collimated light as an illuminated light spot at a predetermined distance from said assembly and including at least one objective element;
• and an iris disposed between said first and second optical means, said iris having an adjustable opening for selectively varying the size of the illuminated light spot between a minimum and a maximum spot diameter at said predetermined distance, wherein said light spot is focused at said predetermined distance at only a first iris opening position, is characterized by:
• means for focusing the illuminated light spot at said predetermined distance for at least one other iris opening position.