Kristin Chenoweth was rushed to a New York hospital after she was injured on the Brooklyn set of "The Good Wife" Wednesday afternoon ... and TMZ has obtained dramatic photos of the actress being treated on the scene.

A source connected to the production of the CBS show tells us ... Kristin was struck by a piece of lighting equipment that collapsed because of a large gust of wind.

We're told Kristin immediately fell to the ground ... and smacked her head on the concrete during the fall.

Someone on the set called 911 around 5:07 PM ET to report a woman who had been hit in the head by a scaffold.

TMZ spoke with a witness who was on the scene who says, "That area is a vortex for wind ... and a big gust of wind blew the lighting off the scaffolding."

The witness tells us Chenoweth was hit "square in the head" and appeared to be "knocked out cold." The witness says, "I thought she was dead at first."

Paramedics treated Kristin on the set ... fitting her with a neck brace and putting her onto a stretcher. She was quickly taken away from the set in an FDNY ambulance and was admitted to a nearby hospital.

A rep for the New York Fire Dept. tells us ... Kristin is being treated for "minor injuries" connected to the accident.

Kristin seems to be accident prone ... she injured her neck during the pre-Broadway engagement of "Wicked" in 2003.

Then, in 2006 she fell off an elevated section of the stage during a rehearsal of the Broadway revival “The Apple Tree.”